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Published:February 02, 2021DOI:https://doi.org/10.1016/S0140-6736(21)00234-8
7 April 2021
Based on current information, a causal relationship between the vaccine and the occurrence of blood clots with low platelets is considered plausible but is not confirmed.
Available in Englisch, French and Russian
Interim Guidance, published 11 January 2021.
The cold chain is necessary to prevent damage to vaccines caused by heat exposure. However, improper use of cold chain equipment may cause damage to freeze-sensitive vaccines (i.e. those vaccines containing alum adjuvant or oil-emulsion adjuvant). Studie
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s conducted in several countries with hot and cold climates show frequent occurrences of sub-zero temperatures in the cold chain. The most common cause of exposure to freezing temperature is the failure to correctly condition ice packs prior to transport. Vaccines that are inadvertently frozen lose potency, increase wastage rates and increase the risk of adverse events following immunization (AEFI). Vaccine carriers protect vaccine potency during immunization sessions and transport to outreach sites. This guidance document is intended to help inform which type of vaccine carrier to select based on local context, to maintain vaccine quality, especially at service delivery points.
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Training on handling, storing and transporting Pfizer BioNTech COVID-19 Vaccine COMIRNATY® (Tozinameran)
recommended
4 August 2021. Currently, Pfizer BioNTech COVID-19 Vaccine COMIRNATY® (Tozinameran) is the only COVID-19 vaccine that should be stored and transported at -60ºC to -86ºC ultra-low temperature (ULT
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) conditions. Prior to use the vaccine can be transferred to -20ºC freezer or +2-8ºC refrigerator at the lower store levels and immunization service points. However, vaccine shelf life is affected when vaccine is transferred to a different storage temperature. Health workers in charge of managing the storage, transport and administration of the vaccine should be well trained to maintain vaccine quality. Good cold chain planning, strong management of vaccine supply, logistics and distribution, including installation and effective monitoring and evaluation of the performance of the storage equipment and infrastructure, are also necessary.
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Herd immunity by mass vaccination offers the potential to substantially limit the continuing spread of COVID-19, but high levels of vaccine hesitancy threaten this goal. In a cross-country analysis of vacc
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ine hesitant respondents across Latin America in January 2021, we experimentally tested how five features of mass vaccination campaigns—the vaccine’s producer, efficacy, endorser, distributor, and current population uptake rate—shifted willingness to take a COVID-19 vaccine. We find that citizens preferred Western-produced vaccines, but were highly influenced by factual information about vaccine efficacy. Vaccine hesitant individuals were more responsive to vaccine messengers with medical expertise than political, religious, or media elite endorsements. Citizen trust in foreign governments, domestic leaders, and state institutions moderated the effects of the campaign features on vaccine acceptance. These findings can help inform the design of unfolding mass inoculation campaigns.
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The article reviews the impact of respiratory syncytial virus (RSV) on global health, emphasizing its significant burden on infants, children, and the elderly. It discusses current and emerging prevention strategies, including the development and implementation of vaccines and monoclonal antibodies.
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The review highlights advancements in RSV research, the challenges of creating effective vaccines for different age groups, and the importance of global collaboration to reduce RSV-associated morbidity and mortality. It also calls for increased investment in research and public health measures to enhance prevention and treatment options.
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How COVID-19 mRNA Vaccines Work
recommended
COVID-19 mRNA vaccines deliver directions to make a protein that educates our immune system, so it will neutralize the virus in future encounters. The mRNA-containing lipid particles are taken up by specialized immune system cells
Trachoma disease
Trachoma is a sequela following infection by the bacterium Chlamydia trachomatis (C. trachomatis). The disease is preventable, but still the cause of blindness in 1.9 million people world wide.
In April 2020, Gavi and COVAX joined the Access to COVID-19 Tools Accelerator (ACT-A) to provide equitable global access to COVID-19 vaccines to tackle the pandemic. In June 2020, the Gavi COVAX Advance Market Commitment (AMC) was launched to finance equitable access in 92 lower-income countries. Si
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nce then, US$ 10 billion has been raised for the AMC to procure vaccines and support delivery. Despite a challenging supply situation, COVAX has now shipped one billion doses to 144 countries, including over 870 million to AMC economies.
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Accelerator Discussion Paper 1: Sustainable Financing
Global Fund, World Bank Group, Gavi, the Vaccine Alliance et al.
World Health Organization (WHO)
(2019)
CC
The Global Action Plan for Healthy Lives and Well-being for All (SDG3 GAP) is a set of commitments by 13 multilateral agencies to strengthen their collaboration. For this purpose several accelerators were created and an invitation for public comment was started. This document focuses on Accelerator
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Discussion Paper 1: Sustainable Financing.
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Meningitis Outbreak Response in Sub-Saharan Africa
Christina Brandes-Barbier, Véronique Millot, Tomas Allen et al
World Health Organization WHO
(2014)
C_WHO
WHO Guideline. Since 2010, countries in the meningitis belt have started to introduce a new serogroup A meningococcal conjugate vaccine conferring individual protection and herd immunity. Following the successful roll-out of this
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vaccine, epidemics due to Neisseria meningitidis serogroup A (NmA) are disappearing, but other serogroups (e.g. NmW, NmX and NmC) still cause epidemics, albeit at a lower frequency and of a smaller size. Due to these changes, WHO organized the review of the evidence to provide recommendations for epidemic control, related to operational thresholds for investigation and response to outbreaks, the use of rapid diagnostic tests, antibiotic regimens in epidemics, and prophylaxis for household contacts of cases
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Surveillance tools for meningitis sentinel hospital surveillance: field guide to rapidly estimate the hospital catchment population (denominator) and the annual rate of hospitalisations
World Health Organization
(2015)
The document will provide information for Ministries of Health and hospital sentinel sites on why and how to determine the denominator of at-risk children <5 years of age and rate of meningitis hospitalizations for a sentinel hospital site conducting IB-VPD surveillance. Such a methodology is currently unavailable and this estimation is critical to enable interpretation of surveillance data, particularly pre- and post-
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vaccine introduction
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Every country has been affected by COVID-19, with nearly a quarter
of a billion cases and almost 5 million deaths reported globally as of
end of September 2021. Despite the stunning speed with which highly
effective and safe vaccines have been developed, new waves of disease
are still pushin
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g health systems to the breaking point, increasingly
transmissible variants are emerging, some survivors are suffering
serious long-term sequelae, and the International Monetary Fund
estimates that global economic losses could exceed US$5.3 trillion
by 2026, if COVID-19 becomes endemic.
Although over 6 billion doses of COVID-19 vaccine have already been
administered, and global production is now reaching 1.5 billion doses
per month, the world is not positioned to end the pandemic. In areas of
high vaccine coverage, there have been massive reductions in serious
disease, hospitalization and death but, globally, vaccine access is highly
inequitable with coverage ranging from 1% to over 70%, depending
largely on a country’s wealth. Consequently, SARS CoV-2 variants
continue to emerge, causing surges of disease and slowing or even
reversing the reopening of societies and economies.
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Vaccine Management in Indonesia
https://doi.org/10.1016/j.vaccine.2019.09.099
Our analysis included 14 Asian countries that were estimated to have a total of 850,000 choleracases and 25,500 deaths in 2015 While, the WHO cholera report documented around 60,000 cholera casesand 28
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deaths. We estimated around $20.2 million (I$74.4 million) in out-of-pocket expenditures, $8.5million (I$30.1 million) in public sector costs, and $12.1 million (I$43.7 million) in lost productivity in2015. Lost productivity due to premature deaths was estimated to be $985.7 million (I$3,638.6 million).Our scenario analyses excluding mortality costs showed that the economic burden ranged from 20.3%($8.3 million) to 139.3% ($57.1 million) in high and low scenarios when compared to the base case sce-nario ($41 million) and was least at 10.1% ($4.1 million) when estimated based on cholera cases reportedto WHO
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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
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.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 four in a series of explainers on vaccine development and distribution
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