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General Science & Health

01/21/2025   Wired Science
The exit will cut a huge chunk from the World Health Organization’s budget, but the short-term financial gain for the US could come at the cost of disease outbreaks flaring up across the world.
01/21/2025   Wired Science
The new president’s orders will take the US out of the Paris Agreement, encourage the extraction and use of fossil fuels, and undo Biden-era policies.
01/21/2025   Wired Science
Non-native grasses and eucalyptus trees brought to California centuries ago for agriculture and landscaping have reshaped the state’s fire dynamics.
01/21/2025   WHO News
The World Health Organization regrets the announcement that the United States of America intends to withdraw from the organization.
01/19/2025   WHO News

The World Health Organization (WHO) welcomes the Gaza ceasefire, hostage and prisoner release deal, which brings hope for millions of people whose lives have been ravaged by the conflict.   

The health challenges ahead are immense. The entire population of Gaza has faced multiple displacements. More than 46 600 people have been killed and over 110 000 have been injured. The real figures are likely much higher. Only half of Gaza’s 36 hospitals remain partially operational, nearly all hospitals are damaged or partly destroyed, and just 38% of primary health care centres are functional. An estimated 25% of those injured – around 30 000 people – face life-changing injuries and will need ongoing rehabilitation. Specialized health care is largely unavailable, medical evacuations abroad are extremely slow. Transmission of infectious diseases has massively increased, malnutrition is rising, and the risk of famine persists. The breakdown of public order, exacerbated by armed gangs, raises further concerns.  

Addressing the massive needs and restoring the health system will be an extremely complex and challenging task, given the scale of destruction, operational complexity and constraints involved. Billions in investment are needed to support recovery of the health system, which will require the unwavering commitment of donors and the international community.  

WHO is ready to scale up the response together with UN health partners including UNFPA, UNICEF, UNRWA and 67 Health Cluster partners. However, it is critical that the security obstacles hindering operations are removed. WHO will need conditions on the ground that allow systematic access to the population across Gaza, enabling the influx of aid via all possible borders and routes, and lifting restrictions on the entry of essential items. Also essential are active protection of civilians and health-care workers, expediting medical evacuations through all possible routes for over 12 000 patients (and their companions) who urgently require specialized care, strengthening and speeding up the referral system to East Jerusalem and the West Bank, and addressing road repairs, rubble removal, and the remediation of unexploded ordnances. 

WHO and partners will need a massive scale-up of funding to meet immediate health needs, and to begin to restore the heath system, including the workforce, supply chain and infrastructure.

WHO and partners will implement a 60-day plan to support the urgent restoration and expansion of the health system. Focus will be on key priority response areas, including trauma and emergency care, comprehensive primary health care, child health, noncommunicable diseases (NCDs), sexual and reproductive health and rights (SRHR), rehabilitation, mental health and psychosocial support (MHPSS).  

Given the immense needs, WHO is scaling up operations and mobilizing critical supplies and resources for delivery into Gaza. A priority will be the assessment and rehabilitation of partially damaged health facilities in high-need areas. Work is ongoing to urgently increase bed capacity across selected hospitals in northern and southern Gaza, together with the expansion of operational capacities, supporting the hiring and redistribution of national health workers, and increasing deployment of international health workers to fill gaps. Plans are underway to integrate prefabricated clinics and hospitals with existing health facilities to enhance service delivery in underserved and newly accessible areas.   

Efforts also are underway to strengthen referral processes for critical care within Gaza and facilitate cross-border medical evacuations. Given the high level of malnutrition and disease outbreaks, WHO is working with partners to expand infant and young child feeding programmes, enhance immunization efforts and reinforce disease surveillance systems for timely prevention, reporting, and outbreak management. 

WHO calls on all parties to uphold their commitment to fully implement the ceasefire agreement and to continue working towards a political solution to address the protracted crisis in the occupied Palestinian territory, which is essential for lasting peace. 

01/19/2025   Wired Science
To make progress on one of number theory’s most elementary questions, two mathematicians turned to an unlikely source.
01/18/2025   Wired Science
Firefighting planes are dumping water from the ocean on the Los Angeles fires, but using saltwater is typically a last resort.
01/18/2025   Wired Science
Essential oils, detox regimens, parasite cleanses, and raw milk have entered the disaster economy.
01/17/2025   Wired Science
The profit margin on crypto mining is all about the physics of computers and energy conversion.
01/17/2025   Wired Science
Alignments of five or more planets are rare—there will be two more featuring five or more planets this year, but after that the next won’t happen until 2040.
01/16/2025   Wired Science
What may be the first commercially available book saved in DNA is the latest example of how consumers might use molecular data storage.
01/16/2025   Wired Science
New photos of Mercury taken during the joint European and Japanese BepiColombo mission reveal fascinating details of the small rocky planet.
01/16/2025   WHO News

Conflict, climate change, epidemics, and displacement are converging to create an unparalleled global health crisis, with 305 million people in urgent need of humanitarian assistance in 2025. In response, the World Health Organization (WHO) is calling for US$ 1.5 billion for its 2025 Health Emergency Appeal (HEA), to support life-saving health interventions worldwide.

The appeal, launched today by WHO Director-General, Dr Tedros Adhanom Ghebreyesus, outlines the critical priorities and resources needed to address 42 ongoing health emergencies, including 17 Grade 3 crises – the most severe emergencies requiring the highest level of response. With health systems stretched to their limits and global financial resources dwindling, the US$ 1.5 billion are needed to help people facing the most difficult situations

“Conflicts, outbreaks, climate-related disasters and other health emergencies are no longer isolated or occasional – they are relentless, overlapping and intensifying,” said Dr Tedros Adhanom Ghebreyesus, WHO Director-General. "From controlling cholera outbreaks to providing mental health support in conflict zones, WHO’s work extends beyond the immediate care we provide. We empower communities to protect themselves, prioritize equity, and build a legacy of preparedness. This appeal is about enabling WHO to save lives, protect the right to health, and provide hope where there is none.”

A coordinated response to protect vulnerable populations

WHO is committed to delivering emergency health assistance, including in conflict zones such as the Democratic Republic of the Congo, the occupied Palestinian territory and Sudan. WHO’s response in emergencies is aligned with wider humanitarian efforts and prioritizes providing essential care and medical supplies; treating malnutrition and supporting maternal and child health; conducting vaccination campaigns to prevent disease outbreaks; and offering mental health support to populations impacted by trauma.

The Appeal highlights four key challenges facing the world currently:  climate change, conflict, displacement and disease outbreaks. These are responsible for fueling deeper, longer lasting health crises and putting the world’s most vulnerable at greater risk.

The appeal further details the priorities and financial needs for each of the Grade 3 emergencies that WHO is responding to.

With the support of donors and partners, WHO aims to fulfill its unique role in health emergencies, while upholding the principles of international humanitarian law, ensuring that no one is left behind even in the most challenging circumstances.

A call to action

This appeal is about more than just funding – it is a call to action. As crises grow more frequent and severe, the gap between global needs and available resources continues to widen. Supporting WHO’s Health Emergency Appeal is a vital investment in global solidarity and health equity.

 

01/16/2025   Wired Science
Calculating air pollution from wildfires and other events has become more complicated. That doesn’t mean it’s necessarily more accurate.
01/15/2025   Wired Science
After the devastation of the Los Angeles fires, officials are ready to rebuild. But defending against future fires requires thinking about more than buildings.
01/14/2025   Wired Science
The space agency’s Spinoff project displays the countless everyday technologies that were spurred by space-related research.
01/14/2025   Wired Science
Signals from the global navigation satellite system can be jammed and spoofed, so a Google spinout is working on an alternative positioning and navigation system that uses the Earth’s magnetic field.
01/13/2025   Wired Science
Melted plastic pipes and drastic water-pressure drops are potentially leaching toxic chemicals and contaminants into local supplies. Multiple water authorities in north Los Angeles have issued Do Not Drink notices.
01/13/2025   Wired Science
Now that Novo Nordisk is the world’s weight-loss juggernaut, will it have to betray its first patients—type 1 diabetics?
01/11/2025   Wired Science
Three exotic new species of superconductivity were spotted last year, illustrating the myriad ways electrons can join together to form a frictionless quantum soup.
01/11/2025   Wired Science
The 1,100-pound mystery object landed in Kenya at the end of December. Experts are still baffled.
01/11/2025   Wired Science
In early January, soil moisture in much of Southern California was in the bottom 2 percent of historical records.
01/11/2025   Wired Science
The arrival of La Niña is starving California of rain, and more high Santa Ana winds could be on the way.
01/08/2025   WHO News

On 18 December 2024, the World Health Organization (WHO) prequalified the first diagnostic test for glucose-6-phosphate dehydrogenase (G6PD) deficiency which can help to safely deliver WHO-recommended treatments to prevent relapse of Plasmodium vivax (P. vivax) infection.

The prequalification of this G6PD diagnostic test marks a significant milestone in facilitating safe and effective P. vivax malaria treatment, reaffirming WHO’s dedication to ensuring equitable access to life-saving health solutions globally. Some 500 000 people die each year from malaria, most of them children.

The prequalification of this test immediately followed the prequalification, in early December, of two new tafenoquine products for anti-relapse treatment of P. vivax malaria, and these therapeutics were recommended in updated WHO malaria guidelines released a few days earlier, in late November.

This package of actions by WHO reflects the organization’s recent adoption of synchronized and parallel processes for two key functions: developing recommendations for essential health products and overseeing their prequalification.

While these processes remain entirely independent, their alignment aims to significantly reduce the time required to bring vital health products to low- and lower-middle-income countries. This streamlined approach underscores WHO’s commitment to improving global health equity by expediting access to life-saving products.

P. vivax malaria is endemic in all WHO Regions except the European Region, with an estimated 9.2 million clinical cases occurring in 2023. P. vivax is the dominant malaria parasite in most countries outside of sub-Saharan Africa

G6PD deficiency, a genetic condition, affects more than 500 million people. While most people are unaware of their G6PD deficiency and go through life without suffering ill effects, certain drugs administered to prevent malaria relapse caused by P. vivax can result in acute haemolysis (destruction of red blood cells). Without accessible and reliable G6PD testing, it has been challenging to safely provide anti-relapse treatments, limiting the widespread use of this effective therapy.

“The prequalification of this G6PD enzyme test for patients with P. vivax malaria can help countries in enhancing access to much-needed quality-assured tests, enabling safe and effective treatment and prevention of this type of relapsing malaria,” said Dr Yukiko Nakatani, WHO Assistant Director-General for Access to Medicines and Health Products. “Currently, no other prequalification applications are received for this type of tests. We encourage the submission of additional products to expand the range of effective diagnostic tools available to countries in need.”

“Wider availability of the test can help strengthen the global malaria response by reducing the number of P. vivax infections due to relapse and in turn reduce onward transmission,” said Dr Daniel Ngamije Madandi, Director of WHO’s Global Malaria Programme.

Testing devices that can accurately distinguish patients with G6PD activity levels above and below the normal levels provide critical information to clinicians to decide which of P. vivax anti-relapse treatment regimens is most appropriate, including low- and high-dose primaquine and single-dose tafenoquine.

The STANDARD G6PD System diagnostic tool manufactured by SD Biosensor, Inc., is a semi-quantitative, near-patient solution designed for the measurement of G6PD enzyme activity in capillary or venous whole blood. The device is intended for use in both laboratory and non-laboratory settings and operates with the STANDARD G6PD Analyzer, a hand-held device, delivering results in a few minutes.

 

12/30/2024   WHO News

Five years ago on 31 December 2019, WHO’s Country Office in China picked up a media statement by the Wuhan Municipal Health Commission from their website on cases of ‘viral pneumonia’ in Wuhan, China. In the weeks, months and years that unfolded after that, COVID-19 came to shape our lives and our world. 

At WHO, we went to work immediately as the new year dawned. WHO employees activated emergency systems on 1 January 2020, and informed the world on 4 January. By 9-12 January, WHO had published its first set of comprehensive guidance for countries, and on 13 January, we brought together partners to publish the blueprint of the first SARS-CoV-2 laboratory test. 

All along, we convened experts and ministries of health from around the world, gathered and analysed data, and shared what was reported, what we learned and what it meant for people. Read about WHO’s actions in this interactive timeline

As we mark this milestone, let’s take a moment to honour the lives changed and lost, recognize those who are suffering from COVID-19 and long COVID, express gratitude to the health workers who sacrificed so much to care for us, and commit to learning from COVID-19 to build a healthier tomorrow. 

We continue to call on China to share data and access so we can understand the origins of COVID-19. This is a moral and scientific imperative. Without transparency, sharing, and cooperation among countries, the world cannot adequately prevent and prepare for future epidemics and pandemics. 

As we pose the question, “Is the world better prepared for the next pandemic than we were for COVID-19?” see WHO Director-General Dr Tedros Adhanom Ghebreyesus’s response at a recent press conference: https://who.canto.global/b/SHEJL

 

12/27/2024   WHO News

WHO is appalled by yesterday’s raid on Kamal Adwan Hospital, which put the last major health facility in North Gaza out of service. The systematic dismantling of the health system and a siege for over 80 days on North Gaza puts the lives of the 75,000 Palestinians remaining in the area at risk.

Initial reports indicate that some areas of the hospital were burnt and severely damaged during the raid, including the laboratory, surgical unit, engineering and maintenance department, operations theatre, and the medical store. Earlier in the day, twelve patients and a female health staff were reportedly forced to evacuate to destroyed and non-functional Indonesian Hospital where it is not possible to provide any care, while the majority of the staff, stable patients and companions were moved to a nearby location. Additionally, some people were reportedly stripped and forced to walk toward southern Gaza. Over the last two months, the area around the hospital has remained highly volatile and attacks on the hospitals and on health workers have occurred almost daily. This week, bombardments in its vicinity reportedly killed 50 people, including five health workers from Kamal Adwan Hospital.

Kamal Adwan is now empty. Yesterday evening, the remaining 15 critical patients, 50 caregivers and 20 health workers were transferred to Indonesian Hospital, which lacks the necessary equipment and supplies to provide adequate care. The movement and treatment of these critical patients under such conditions pose grave risks to their survival. WHO is deeply concerned for their wellbeing, as well as for the Kamal Adwan Hospital director who has been reportedly detained during the raid. WHO lost contact with him since the raid began.

An urgent WHO mission to Indonesian Hospital is being planned for tomorrow to assess the situation at the facility, provide basic medical supplies, food and water, and safely move critical patients to Gaza City for continued care.

The raid on the Kamal Adwan hospital follows escalating restrictions on access and repeated attacks. Since early October 2024, WHO has verified at least 50 attacks on health on or near the hospital. Despite the increasingly dire needs for emergency and trauma services and supplies, only 10 out of 21 WHO missions to Kamal Adwan have been partially facilitated between early October and December. During these missions, 45 000 liters of fuel, medical supplies, blood, and food were delivered, and 114 patients along with 123 companions were transferred to Al-Shifa Hospital. But the deployment of international emergency medical teams has been repeatedly denied.  

WHO and partners' efforts to sustain the hospitals’ operations have been undone. With Kamal Adwan and Indonesian hospitals entirely out of service, and Al-Awda Hospital barely able to function, and severely damaged due to recent airstrikes, the healthcare lifeline for those in North Gaza is reaching a breaking point. 

WHO calls for urgently ensuring that hospitals in North Gaza can be supported to become functional again. 

Hospitals have once again become battlegrounds, reminiscent of the destruction of the health system in Gaza City earlier this year.

Since October 2023, WHO has repeatedly issued urgent calls to protect health workers and hospitals as per international humanitarian law —yet these calls remain unheard. Health facilities, workers and patients are always off limits. They must be actively protected and never be attacked, nor used for military purposes. The principles of precaution, distinction and proportionality under International Humanitarian Law are absolute and always apply. 

 

12/26/2024   WHO News

Our mission to negotiate the release of the United Nations staff detainees and to assess the health and humanitarian situation in Yemen concluded today.

We continue to call for the detainees' immediate release. 

As we were about to board our flight from Sana’a, about three hours ago (around 5 pm local time), the airport came under aerial bombardment.  One of our plane’s crew members was injured.  At least two people were reported killed at the airport. 

The air traffic control tower, the departure lounge — just a few meters from where we were — and the runway were damaged.  We will need to wait for the damage to the airport to be repaired before we can leave.

My UN and WHO colleagues and I are safe.

Our heartfelt condolences to the families whose loved ones lost their lives in the attack.

12/23/2024   WHO News
A Strategic Partnership Framework (SPF) with the Ministry of Development Cooperation and Humanitarian Affairs and multiyear agreement with the Ministry of Health and Social Safety was signed on 20 December 2024. By signing two new partnership agreements, Luxembourg reaffirmed its continued support for WHO to fulfill a shared mission to promote, provide and protect health.
12/23/2024   WHO News

Key points:

  • Vaccination remains an important public health countermeasure against COVID-19. As per the WHO Director General’s standing recommendations for COVID-19, Member States are recommended to continue to offer COVID-19 vaccination based on the recommendations of the WHO Strategic Advisory Group of Experts on Immunization (SAGE).
  • SARS-CoV-2 continues to circulate and evolve with important genetic and antigenic evolution of the spike protein since the beginning of the COVID-19 pandemic.
  • The objective of an update to COVID-19 vaccine antigen composition is to enhance vaccine-induced immune responses to circulating SARS-CoV-2 variants.
  • The WHO TAG-CO-VAC advises retaining the use of a monovalent JN.1 lineage variant as the antigen in future formulations of COVID-19 vaccines.
  • In accordance with WHO SAGE policy, vaccination should not be delayed in anticipation of access to vaccines with an updated composition; vaccination programmes can continue to use any available WHO emergency-use listed or prequalified COVID-19 vaccines. 

The WHO Technical Advisory Group on COVID-19 Vaccine Composition (TAG-CO-VAC) continues to  closely monitor the genetic and antigenic evolution of SARS-CoV-2 variants, immune responses to SARS-CoV-2 infection and COVID-19 vaccination, and the performance of COVID-19 vaccines against circulating variants. Based on these evaluations, WHO advises vaccine manufacturers and regulatory authorities on the implications for future updates to COVID-19 vaccine antigen composition. In April 2024, the TAG-CO-VAC recommended the use of a monovalent JN.1 lineage vaccine antigen as one approach to induce enhanced neutralizing antibody responses to JN.1 and its descendent lineages.  Several manufacturers (using mRNA and recombinant protein-based vaccine platforms) have updated COVID-19 vaccine antigen composition to monovalent JN.1 lineage formulations (JN.1 or KP.2) and some of these have been approved for use by regulatory authorities. Previous statements from the TAG-CO-VAC can be found on the  WHO website.

The TAG-CO-VAC reconvened on 10-12 December 2024 to review the genetic and antigenic evolution of SARS-CoV-2; immune responses to SARS-CoV-2 infection and/or COVID-19 vaccination; the performance of currently approved vaccines against circulating SARS-CoV-2 variants; and the implications for COVID-19 vaccine antigen composition.

Evidence reviewed

The published and unpublished evidence reviewed by the TAG-CO-VAC included: (1) SARS-CoV-2 genetic evolution with additional support from the WHO  Technical Advisory Group on SARS-CoV-2 Virus Evolution (TAG-VE); (2) Antigenic characterization of previous and emerging SARS-CoV-2 variants using virus neutralization tests with animal antisera and further analysis of antigenic relationships using antigenic cartography; (3) Immunogenicity data on the breadth of neutralizing antibody responses elicited by currently approved vaccine antigens against circulating SARS-CoV-2 variants using animal and human sera; (4) Preliminary immunogenicity data on immune responses following infection with circulating SARS-CoV-2 variants; (5) Available vaccine effectiveness (VE) estimates of currently approved vaccines during periods of circulation of XBB.1 and JN.1 lineages; and (6) Preliminary preclinical and clinical immunogenicity data on the performance of candidate vaccines with updated antigens shared confidentially by vaccine manufacturers with TAG-CO-VAC. Further details on the publicly available data reviewed by the TAG-CO-VAC can be found in the accompanying data annex. Unpublished and/or confidential data reviewed by the TAG-CO-VAC are not shown.

Summary of available evidence

  • In 2024, SARS-CoV-2 continues to circulate globally and cause severe disease, post COVID-19 condition and death. The majority of COVID-19 deaths continue to occur in individuals aged 65 years and older and those with coexisting conditions. There are persistent and increasing gaps in the reporting of cases, hospitalizations and deaths, from WHO Member States, making epidemiological trends difficult to infer.
  • Currently circulating SARS-CoV-2 variants are all derived from JN.1. The weekly proportion of XEC sequences among all SARS-CoV-2 sequences submitted to GISAID continues to increase, while the weekly proportions of all other Variants of Interest (JN.1) or Variants Under Monitoring (KP.2, KP.3, KP.3.1.1, JN.1.18 and LB.1) are now declining. There are other JN.1-derived variants that are currently in low proportions, but which have mutations that may give them an advantage over XEC: currently LP.8.1, NP.1, LF.7.2 are variants being monitored and/or characterized.
  • In published and unpublished data using antisera from naïve animal models, circulating JN.1-derived variants (JN.1, JN.1.16.1, KP.2, KP.2.3, KP.3, KP.3.1.1, LB.1 and XEC) are antigenically closely related.
    • Analysis of naïve mice immunized with mRNA vaccine antigens (KP.3, KP.3.1.1, XEC) showed that JN.1, KP.3.1.1, XEC are antigenically closely related to each other (approximately 1 antigenic unit in cartographic analysis, which corresponds to a two-fold-reduction in neutralization). Antisera to KP.3.1.1 and XEC generate cross-reactive neutralizing antibody titers to each other and to other emerging variants.
    • Antisera from naïve hamsters infected with JN.1 descendent lineages showed that circulating JN.1-derived variants such as KP.3.1.1 are antigenically closely related to JN.1 and to each other (approximately 1 antigenic unit in cartographic analysis). JN.1 antisera showed greater cross-reactivity to KP.2 and KP.3.1.1, as compared to KP.2 antisera.
  • In published and unpublished data from humans, vaccination with monovalent JN.1 or KP.2 antigens significantly increased neutralizing antibody titers that cross-reacted with all JN.1 descendent lineages tested.
    • Analysis of pre- and post-vaccination sera from JN.1 or KP.2 immunized individuals demonstrated that vaccination results in strong rises in neutralizing antibody titers against JN.1 and descendent variants, including KP.2, KP.2.3, KP.3, KP.3.1.1 and XEC.
    • Post-monovalent JN.1 or KP.2 vaccination neutralizing antibody titers against KP.3.1.1 and XEC were modestly lower (consistent 2-fold reductions in titers) than those against the homologous JN.1 or KP.2 antigens.
    • There were greater reductions in cross-neutralization of emerging JN.1 lineage variants using post-monovalent XBB.1.5 vaccination sera, as compared to post-monovalent JN.1 or post-monovalent KP.2 vaccination sera.
  • In a context of infection- and vaccine-derived immunity in the majority of the population, contemporary vaccine effectiveness (VE) estimates are relative (rVE) rather than absolute (comparing vaccinated to unvaccinated individuals). rVE, sometimes referred to as “up-to-date VE”, demonstrates the added protection of most recent vaccination over and above pre-existing immunity derived from previous infections and/or vaccinations. There are currently studies reporting VE or rVE estimates using monovalent JN.1 lineage (JN.1 or KP.2) vaccines.  
  • Approved monovalent XBB.1.5 mRNA COVID-19 vaccines continued to provide additional protection against severe disease and death during periods of XBB descendent lineage circulation in the first three months after vaccination; rVE point estimates against symptomatic disease were typically lower. During periods of JN.1 descendent lineage circulation, monovalent XBB.1.5 mRNA vaccines continued to show additional protection in the first three months after vaccination, however, available evidence points towards a reduction in rVE estimates against JN.1-derived variants, as compared to XBB.1 lineage variants, for protection against death, severe disease, symptomatic disease and infection.
  • The VE estimates for monovalent XBB.1.5 vaccines against JN.1-derived variants are consistent with reductions in neutralizing antibody titers observed in preclinical and clinical immunogenicity studies of post-monovalent XBB.1.5 vaccination sera against JN.1 descendent variants, as compared to XBB.1 lineage variants.
  • Preclinical data shared confidentially with the TAG-CO-VAC by vaccine manufacturers show that immunization of naïve mice, as well as of mice previously immunized with SARS-CoV-2 variants with monovalent JN.1-containing or monovalent KP.2-containing vaccine candidates resulted in good neutralization of JN.1 and descendent variants, including KP.3.1.1, XEC and MC.1. However, neutralizing antibody titers against KP.3.1.1, XEC and MC.1 were approximately 2-fold lower than those against the homologous immunizing antigen. A single preclinical immunogenicity study in mice using an XEC vaccine candidate showed comparable neutralizing antibody titers against JN.1, KP.3.1.1 and XEC as compared to a JN.1 vaccine candidate.
  • Clinical data shared confidentially with the TAG-CO-VAC by vaccine manufacturers show that post-monovalent JN.1 sera neutralized JN.1 and its derivatives including KP.3.1.1 and XEC well.

The TAG-CO-VAC acknowledges several limitations of the available data: 

  • There are persistent and increasing gaps in the reporting of cases, hospitalizations and deaths, from WHO Member States, as well as in genetic/genomic surveillance of SARS-CoV-2 globally, including low numbers of samples sequenced and limited geographic diversity. The TAG-CO-VAC strongly supports the ongoing work of the WHO  Coronavirus Network (CoViNet) to address this information gap.
  • The timing, specific mutations and antigenic characteristics of emerging and future variants are difficult to predict, and the potential public health impact of these variants remain unknown. There are JN.1-derived variants such as LP.8.1, NP.1 and LF.7.2 that are currently in low proportions, but which have mutations that may give them more immune escape than XEC. These will continue to be monitored and/or characterized. The TAG-CO-VAC strongly supports the ongoing work of the TAG-VE. 
  • Although neutralizing antibody titers have been shown to be important correlates of protection from SARS-CoV-2 infection and of estimates of vaccine effectiveness, there are multiple components of immune protection elicited by infection and/or vaccination. Data on the immune responses following JN.1 descendent lineage infection or monovalent JN.1, KP.2 or XBB.1.5 vaccination are largely restricted to neutralizing antibodies. Data and interpretation of other aspects of the immune response, including cellular immunity, are limited. 
  • Immunogenicity data against currently circulating SARS-CoV-2 variants are not available for all COVID-19 vaccines. Further, there are very limited data on immune responses following infection in humans with recent SARS-CoV-2 variants (e.g., KP.3.1.1, XEC).
  • Estimates of VE against recently circulating SARS-CoV-2 variants, including XBB or JN.1 descendent lineages, are limited in terms of the number and geographic diversity of studies, vaccine platforms evaluated, populations assessed, and duration of follow-up. Furthermore, the referent population for VE estimates varies substantially with respect to prior history of vaccination. There are currently no direct comparative estimates for monovalent JN.1, KP.2 or XBB.1.5 vaccines versus other antigen composition(s) delivered during the same time period. Finally, VE estimates may be confounded by differences in undocumented infection-derived immunity between groups, leading to potential underestimation of VE.

Recommendations for COVID-19 vaccine antigen composition

Given the breadth in immune responses demonstrated by monovalent JN.1 lineage vaccines against circulating variants, the TAG-CO-VAC advises retaining the current COVID-19 vaccine antigen composition, i.e. a monovalent JN.1 lineage variant (NextStrain: 24A, GenBank: PP298019, GISAID: EPI_ISL_18872762) as one approach to induce enhanced neutralizing antibody responses to JN.1 and its descendent variants (e.g., KP.3.1.1 and XEC).

Other approaches that demonstrate broad and robust neutralizing antibody responses against currently circulating JN.1 descendent lineage variants, such as vaccine antigens derived from more recent variants or alternative formulations, could also be considered.

As per the WHO Director General’s  standing recommendations for COVID-19, Member States are recommended to continue to offer COVID-19 vaccination based on the recommendations of the WHO SAGE. Vaccination should not be delayed in anticipation of access to vaccines with an updated composition; vaccination programmes can continue to use any available WHO emergency-use listed or prequalified COVID-19 vaccines.

Further data requested

Given the limitations of the evidence upon which the recommendations above are derived and the anticipated continued evolution of the virus, the TAG-CO-VAC strongly encourages generation of the following data (in addition to the types of data outlined in October 2024): 

    • Immune responses and clinical endpoints (i.e. VE and/or comparator rates of infection and severe disease) in varied human populations who receive COVID-19 vaccines with a monovalent JN.1 or KP.2 vaccine antigen composition, across different vaccine platforms, as well as further clinical and laboratory data on the performance of all currently approved COVID-19 vaccines against emerging SARS-CoV-2 variants.
    • Strengthened epidemiological and virological surveillance, as per the Standing Recommendations for COVID-19 in accordance with the International Health Regulations (2005), to determine if emerging variants are antigenically distinct and able to displace circulating variants.
    • Clinical evaluation of relevant new vaccine antigens derived from more recent variants.

As previously stated, the TAG-CO-VAC continues to encourage the further development of vaccines that may improve protection against infection and reduce transmission of SARS-CoV-2.

The TAG-CO-VAC will continue to closely monitor the genetic and antigenic evolution of SARS-CoV-2 variants, immune responses to SARS-CoV-2 infection and COVID-19 vaccination, and the performance of COVID-19 vaccines against circulating variants. The TAG-CO-VAC will also continue to reconvene every six months to evaluate the implications for COVID-19 vaccine antigen composition. At each meeting, recommendations to either maintain current vaccine composition or to consider updates will be issued.