The COVID-19 vaccine tracker and landscape compiles detailed information of each COVID-19 vaccine candidate in development by closely monitoring their progress through the pipeline.
The COVID-19 vaccine tracker:
Provides summary tables of COVID-19 vaccine candidates in both clinical and pre-...clinical development;
Provides analysis and visualization for several COVID-19 vaccine candidate categories;
Tracks the progress of each vaccine from pre-clinical, Phase 1, Phase 2 through to Phase 3 efficacy studies and including Phase 4 registered as interventional studies;
Provides links to published reports on safety, immunogenicity and efficacy data of the vaccine candidates;
Includes information on key attributes of each vaccine candidate and
Allows users to search for COVID-19 vaccines through various criteria such as vaccine platform, schedule of vaccination, route of administration, developer, trial phase and clinical endpoints.
The database is updated regularly - twice a week (Tuesday and Friday, 17:00 CET).
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This module is part of the WHO series The Immunological Basis for Immunization, which was initially developed in 1993 as a set of eight modules, comprising one module on general immunology and seven modules each devoted to one of the vaccines recommended for the Expanded Programme on Immunization, i....e. vaccines against diphtheria, measles, pertussis, polio, tetanus, tuberculosis and yellow fever. Since then, this series has been updated and extended to include other vaccines of international importance. The main purpose of the modules is to provide national immunization managers and vaccination professionals with an overview of the scientific basis of vaccination against a range of important infectious diseases. The modules developed since 1993 continue to be vaccine-specific, reflecting the biological differences in immune responses to the individual pathogens and the differing strategies employed to create the best possible level of protection that can be provided by vaccination. The modules also serve as a record of the immunological basis for the WHO recommendations on vaccine use, published in the WHO vaccine position papers.*
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This article is part of a series of explainers on vaccine development and distribution. Learn more about vaccines – from how they work and how they’re made to ensuring safety and equitable access – in WHO’s Vaccines Explained series.
Vaccines are supported by decades of medical research. ...They work by preparing the body's own immune system to recognise and defend against a specific disease. The volume of information available about vaccination can be overwhelming, so it’s important to talk through the topic.
Available in different languages
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Countries across the world are facing diverse epidemiological situations with varying response
capacities and access to life saving tools. The World Health Organization (WHO) recommends that national authorities continue to apply a risk-based approach when implementing measures related to COVID-19... and international travel while respecting the dignity, human rights and fundamental freedoms of travellers. This approach should consider the risk posed by travel for the importation and exportation of cases in the context of the evolving epidemiology, including the emergence and circulation of virus variants of concern; the expansion of the COVID-19 vaccination roll-out; and lessons learned while responding to the pandemic, including on the early detection and management of cases and the application of public health and social measures.
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Contact tracing for COVID-19 is the process of identifying, assessing, and managing people who have been exposed to someone who has been infected with the SARS-CoV-2 virus, while quarantine is the separation of contacts from other people after exposure to a probable or confirmed case of SARS-CoV-2 i...nfection. In the context of growing global population immunity from COVID-19 vaccination and past SARS-CoV-2 infection, WHO recommends that identification, contact, quarantine and follow-up should be prioritized for individuals at high risk who have been in contact with a confirmed or probable case of SARS-CoV-2 infection, rather than targeting all contacts. This updated guidance also introduces shorter recommended quarantine periods, including the ability to further shorten quarantine through the use of testing. National and local health authorities should use risk-based approaches to contact tracing and quarantine that include reviewing and adjusting to their local circumstances and disease epidemiology, population immunity, their health system’s capacities, and risk tolerance.
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Brucellosis is widespread in both humans and livestock in many developing countries. The authors have performed a series of epidemiological studies on brucellosis in agro-pastoral areas in Tanzania since 2015, with the aim of the disease control. Previously, the potential of a community-based brucel...losis control initiative, which mainly consisted of the sale of cattle with experience of abortion and vaccinating calves, was assessed as being effective and acceptable based on a quantitative approach. This study was conducted to investigate the feasibility of community-based brucellosis control program using participatory rural appraisals (PRAs) and key-informant interviews. Four PRAs were performed together with livestock farmers and livestock and medical officers in 2017. In the PRAs, qualitative information related to risky behaviors for human infection, human brucellosis symptoms, willingness to sell cattle with experience of abortion, and willingness to pay for calf vaccination were collected, and a holistic approach for a community-based disease control project was planned. All of the communities were willing to implement disease control measures. To avoid human infection, education, especially for children, was proposed to change risky behaviors. The findings of this study showed that community-based disease control measures are promising.
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1.0 PURPOSE
To define the procedure for the conduct of in-person meetings in both healthcare and community settings in response to COVID-19 and with respect to Public Health and Social Measures (PHSMs) to reduce the risk of disease transmission. A general risk assessment must be conducted to inform... context specific recommendations.
2.0 SCOPE
The procedure in this document is applicable to all meetings that require convening people
together physically.
3.0 SAFETY AND HYGIENE PROCEDURE
Before entry into the meeting room/venue:
• Presentation of evidence for complete doses of COVID-19 vaccination (depending on COVID-19 vaccine taken) or negative COVID-19 PCR test done within the last 72 hours, or where applicable proof of daily negative RDT result. The Africa Union Trusted Travel platform, with technical support from the PanaBIOS Consortium has implemented an online system that allows Airlines and Port Health services to authenticate and verify traveler’s COVID-19 results certificates in line with international standards, across Africa and beyond.
• Hand hygiene stations should be available at the points of entry.
• All participants must wear a well fitted mask that covers the nose and mouth. Medical masks should be provided all meeting participants.
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Declarations of interests were collected from all external contributors and assessed for any conflicts of interest. Summaries of the reported interests can be found on the SAGE meeting website and SAGE Covid-19 Working Group webpage. This guidance should be considered along with the broader COVID-...19 policy advice to WHO member states and in particular the advice on how to reach the COVID-19 vaccination targets.
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Leishmaniasis is a spectrum of disease caused by the infection of protozoan parasite Leishmania mainly affecting the antigen presenting cell of the host. The disease is although considered as neglected tropical disease still it is not completely eradicated. Majority of the issues related to the ther...apeutic approach is due to increased cytotoxicity of the drugs, less effectiveness, high cost and occurrence of drug resistance. Therefore, recent advancement in the field of parasitology has taken into consideration of the specific arms of immunity which can be triggered with the help of natural products, synthetic molecules or parasite specific ligands which helps in the restoration of host protective immunity and recovery from the infection. Therefore, in this review, we have highlighted the recent advancement in the field of Leishmania research taken into consideration of the therapeutic perspective. We have shown that apart from therapeutic potential of the available drugs and vaccination approach, the immune-therapy are emerging as the modern regime of treatment where the effectiveness of the therapy is significantly increased and making it safer and promising.
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As of 12 December 2022, over 645 million people worldwide have been diagnosed with COVID-19, with over 6.6 million deaths (4).
The Omicron variant, which emerged in late November 2021, and its subvariants, are now the dominant circulating viruses, contributing to the ongoing surge in several countr...ies (4). Vaccination has substantially reduced case numbers and hospitalizations in many countries,but limitations in global access to vaccines mean that many populations, including those in low- and middle-income countries, remain vulnerable. Even in vaccinated individuals, uncertainties remain about duration of protection and efficacy, and the degree of crossprotection with new variants.
There remains a need for more effective treatment and management for those affected by COVID-19. The pandemic – and the
explosion of both research and misinformation – has highlighted the need for trustworthy, accessible and regularly updated living
guidelines to place emerging findings into context and provide clear recommendations for clinical practice
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The WHO continuously reviews available data on SARS-CoV-2 variants of concern. For this version, the global epidemiological
situation of the COVID-19 pandemic as of 21 January 2022 – at a time when the Omicron VOC had been identified in 171
countries across all six WHO Regions and was rapidly re...placing Delta worldwide – was considered Omicron has a substantial growth advantage, higher secondary attack rates and a higher observed reproduction number than Delta.
There is now significant evidence that immune evasion contributes to the rapid spread of Omicron. Other factors may be a shorter
serial interval (by about 0.8 to 1.2 days compared to Delta) and potential increased intrinsic transmission fitness . There is
growing evidence that with Omicron, there is lower vaccine effectiveness (VE) against infection and symptomatic disease soon after vaccination compared to Delta. There is also evidence of accelerated waning of VE over time of the primary series against infection and symptomatic disease for the studied vaccines. Further studies are required to better understand the drivers of transmission and declining incidence in various settings. These factors include the intrinsic transmission fitness properties of the virus, degree of immune evasion, vaccination coverage and level of vaccine-derived and post-infection immunity, levels of social mixing and degree of application of public health and social measures (PHSM).
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Le Nigéria a signalé son premier cas de COVID-19 vers fin février 2020. Le pays a ensuite connu quatre vagues de
contaminations avec des pics en juin 2020, janvier 2021, août 2021 et décembre 2021. La pandémie de COVID-19
a eu de graves conséquences sur l’économie du Nigéria et a entra...né une perturbation des services de santé
dans l’ensemble du pays. Pendant la crise, de nombreux Nigérians n’ont pu accéder aux services de santé courants
en raison d’une baisse de revenus et des restrictions liées aux confinements. Les services de santé de la mère
et du nouveau-né, les services de vaccination, de soins aux enfants malades, de planification familiale et de
traitement des maladies non transmissibles ont été les plus perturbés
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Nigeria reported its first case of COVID-19 at the end of February 2020 and subsequently experienced
four waves, with peaks in June 2020 and January, August and December 2021. The COVID-19 pandemic
severely impacted the economy of Nigeria and caused disruption of health services nationwide. During... the crisis, many Nigerians failed to access routine health
services due to decreased income and lockdown
restrictions. The most significant service disruptions
were in maternal and newborn health, vaccination,
sick childcare, family planning and noncommunicable
disease treatment services (1). Pregnant women
were anxious about contracting COVID-19 during
2020, and as a result, many avoided attending health
facilities for antenatal (ANC) and postnatal care (PNC).
Disruptions in the medical supply chain and diversion
of resources to COVID-19 management impacted on
essential health services. Health workers were often
unable to go to work because of transport disruptions
or illness
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A regimen of four 1-mL doses of HDCV or PCEC vaccines should be administered intramuscularly to previously unvaccinated persons.
The first dose of the four-dose course should be administered as soon as possible after exposure. Additional doses should be administered on days 3, 7, and 14 after the... first vaccination. For adults, the vaccination should always be administered intramuscularly in the deltoid area (arm). For children, the anterolateral aspect of the thigh is also acceptable. The gluteal area should never be used for rabies vaccine injections because observations suggest administration in this area results in lower neutralizing antibody titers.
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For the past years, Haiti has been engulfed in a socioeconomic, political, and humanitarian crisis that has reached critical levels since mid-September 2022 with the intensification of gang violence and social unrest. The widespread insecurity and
political instability have drastically affected the... country’s access to essential goods and services, including food, water, and health. The current fuel supply crisis has affected the water and electricity supply to the population, health centers, and hospitals. Due to problems of insecurity and violence, patients and health personnel have difficulty accessing hospitals and health services.
In parallel, the public health system and international partners face limited response capacity due to reduced international personnel in Haiti, logistics issues, and difficulties in importing supplies. Indeed insecurity, roadblocks, and lockdowns are affecting the importation of internationally procured goods, which may slow the arrival of essential lifesaving supplies to support cholera response efforts. This scenario is particularly problematic, as cholera recently resurfaced in early October.
Armed gangs now control over 60% of the metropolitan area of Port-au-Prince, affecting at least 1.5 million people, and have expanded their influence outside of the capital city, interrupting vital humanitarian programs in most of the national territory,
including COVID-19 vaccination campaigns.
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Geneva, 22 May 2023 – Gavi, the Vaccine Alliance today published a roadmap* outlining critical actions needed to ensure supply of oral cholera vaccine (OCV) is able to meet growing demand from countries. Released against a backdrop of a recent wave of cholera outbreaks around the world, the roadma...p forecasts the short-, mid- and long-term outlook for global cholera vaccine supply. Developed in consultation with a range of key Alliance partners, including WHO, UNICEF, the Global Taskforce for Cholera Control (GTFCC), and the Bill and Melinda Gates Foundation (BMGF), it describes how these organizations, manufacturers and countries can work together towards ensuring global OCV supply can support largescale preventive vaccination by 2026.
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La fièvre jaune est endémique dans plusieurs pays d'Amérique latine. Afin d'aider les décideurs à hiérarchiser les actions de prévention contre cette maladie, l'Organisation panaméricaine de la santé présente ces profils de pays avec une sélection concise et complète de données provenan...t des pays endémiques. Chaque profil fournit une analyse de la situation actuelle du pays, des facteurs écologiques et climatiques associés à la maladie, de la distribution et de l'incidence des vecteurs, ainsi que des principales activités des arbovirus. Il comprend également une perspective historique de l'épidémiologie et un résumé de la situation de la vaccination contre la maladie dans le pays.
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Development assistance for health (DAH), the value of which peaked in 2013 and fell in 2015, is unlikely to rise substantially in the near future, increasing reliance on domestic and innovative financing sources to sustain health programmes in low-income and middle-income countries. We examined inno...vative financing instruments (IFIs)—financing schemes that generate and mobilise funds—to estimate the quantum of financing mobilised from 2002 to 2015. We identified ten IFIs, which mobilised US$8·9 billion (2·3% of overall DAH) in 2002–15. The funds generated by IFIs were channelled mostly through GAVI and the Global Fund, and used for programmes for new and underused vaccines, HIV/AIDS, malaria, tuberculosis, and maternal and child health. Vaccination programmes received the largest amount of funding ($2·6 billion), followed by HIV/AIDS ($1080·7 million) and malaria ($1028·9 million), with no discernible funding targeted to non-communicable diseases.
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WHO has updated its guidelines for COVID-19 therapeutics, with revised recommendations for patients with non-severe COVID-19. This is the 13th update to these guidelines.
Updated risk rates for hospital admission in patients with non-severe COVID-19
The guidance includes updated risk rates for... hospital admission in patients with non-severe COVID-19.
The current COVID-19 virus variants tend to cause less severe disease while immunity levels are higher due to vaccination, leading to lower risks of severe illness and death for most patients.
This update includes new baseline risk estimates for hospital admission in patients with non-severe COVID-19. The new ‘moderate risk’ category now includes people previously considered to be high risk including older people and/or those with chronic conditions, disabilities, and comorbidities of chronic disease. The updated risk estimates will assist healthcare professionals to identify individuals at high, moderate or low risk of hospital admission, and to tailor treatment according to WHO guidelines:
**High: **People who are immunosuppressed remain at higher risk if they contract COVID-19, with an estimated hospitalization rate of 6%.
**Moderate: **People over 65 years old, those with conditions like obesity, diabetes and/or chronic conditions including chronic obstructive pulmonary disease, kidney or liver disease, cancer, people with disabilities and those with comorbidities of chronic disease are at moderate risk, with an estimated hospitalization rate of 3%.
Low: Those who are not in the high or moderate risk categories are at low risk of hospitalization (0.5%). Most people are low risk.
Review of COVID-19 treatments for people with non-severe COVID-19
WHO continues to strongly recommend nirmatrelvir-ritonavir (also known by its brand name ‘Paxlovid’) for people at high-risk and moderate risk of hospitalization. The recommendations state that nirmatrelvir-ritonavir is considered the best choice for most eligible patients, given its therapeutic benefits, ease of administration and fewer concerns about potential harms. Nirmatrelvir-ritonavir was first recommended by WHO in April 2022.
If nirmatrelvir-ritonavir is not available to patients at high-risk of hospitalization, WHO suggests the use of molnupiravir or remdesivir instead.
WHO suggests against the use of molnupiravir and remdesivir for patients at moderate risk, judging the potential harms to outweigh the limited benefits in patients at moderate risk of hospital admission.
For people at low risk of hospitalization, WHO does not recommend any antiviral therapy. Symptoms like fever and pain can continue to be managed with analgesics like paracetamol.
WHO also recommends against use of a new antiviral (VV116) for patients, except in clinical trials.
The update also includes a strong recommendation against the use of ivermectin for patients with non-severe COVID-19. WHO continues to advise that in patients with severe or critical COVID-19, ivermectin should only be used in clinical trials.
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WHO has published the first-ever guidance on the clinical management of diphtheria. The only previously available guidance was an operational protocol. The new guidance followed the rigorous process for developing guidance at WHO.
It addresses the use of Diphtheria Antitoxin (DAT) in the treatmen...t of diphtheria. There is a worldwide shortage of DAT and evidence based recommendations on the use of DAT were requested by many Member States.
The guidance also includes new recommendations on antibiotics. In patients with suspected or confirmed diphtheria, WHO recommends using macrolide antibiotics (azithromycin, erythromycin) rather than penicillin antibiotics.
This clinical practice guideline has been rapidly developed recognizing the global increase in diphtheria outbreaks. Outbreaks of diphtheria in Nigeria, Guinea and neighbouring countries in 2023 have highlighted the urgent need for evidence-based clinical practice guidelines for the treatment of diphtheria. Given the sporadic nature of outbreaks, many clinicians in the affected regions have never managed acute diphtheria and its related complications. Diphtheria remains a neglected disease and vaccination is the top priority. At the same time, for patients with diphtheria, access to antibiotics, DAT and supportive care can be lifesaving.
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