How much protection does the current batch of COVID-19 vaccines provide us? Would you need a booster shot for new variants? What does science and evidence tell us about mass gatherings and the spread of COVID-19?
WHO’s Chief Scientist Dr Soumya Swaminathan explains in Science in 5 this week.
These WHO interim recommendations for use of the Sinovac-CoronaVac were developed on the basis of advice issued by the Strategic Advisory Group of Experts on Immunization (SAGE) and the evidence summary included in the background document and annexes referenced below.
This document has been updat...ed: version 15 March 2022.
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Bisher hat die STIKO empfohlen, dass alle im Ausland mit einem nicht in der EU zugelassenen Impfstoff geimpften Personen eine erneute Impfserie mit einem in der EU zugelassenen Impfstoff erhalten sollen. Ziel der im Epidemiologischen Bulletin 13/2022 veröffentlichten aktualisierten COVID-19-Impfemp...fehlung ist es, Personen, die eine COVID-19-Impfung mit einem der nicht in der EU zugelassenen Ganzvirusimpfstoffen (CoronaVac, Covilo und Covaxin) oder dem Vektor-basierten Impfstoff Sputnik V erhalten haben, mit einem Impfschutz auszustatten, der vergleichbar mit dem einer Grundimmunisierung plus Auffrischimpfung mit einem mRNA-Impfstoff ist.
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Interim guidance, 26 October 2021
This interim guidance has been developed on the basis of the advice issued by the Strategic Advisory Group of Experts (SAGE) on Immunization at its meeting on 5 October 2021.
SAGE said moderately and severely immunocompromised persons should be offered an addition...al dose of all WHO approved vaccines “since these individuals are less likely to respond adequately to vaccination following a standard primary vaccine series and are at high risk of severe COVID-19 disease.”
People aged 60 and older who received the Sinovac and Sinopharm vaccines should get a third dose too, the experts added, though use of other vaccines may also be considered depending on supply and access.
“When implementing this recommendation, countries should initially aim at maximizing 2-dose coverage in that population, and thereafter administer the third dose, starting in the oldest age groups”, they said.
SAGE has also reviewed a vaccine developed by Indian company Bharat Biotech and will issue a policy recommendation after WHO greenlights it for emergency use.
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Overview
16 Dec 2021. This interim guidance pertains to heterologous primary and heterologous boosting schedules of Covid-19 vaccines. It focuses on heterologous schedules combining multiple vaccine platforms (e.g. a vectored vaccine followed by an mRNA vaccine).
Guidelines for the Vaccination Scheme against
COVID 19: Booster Dose Health Personnel
Memorandum: Recommendation of interval for the application of the booster dose of COVID-19 vaccines
Additional dose of the primary vaccination against COVID-19: Technical Guidelines
17 Febr. 2022. As part of the “Strategy to Achieve Global COVID-19 Vaccination by mid-2022”, global targets of 40% population coverage by end of 2021 and 70% coverage by June 2022 have been set by the World Health Organization (WHO), to successfully prevent severe illness and deaths, minimize so...cial disruption and economic consequences of COVID-19, curtail the emergence of new SARS-CoV-2 variants of concern (VOCs) and ultimately control the pandemic.
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Ethnic disparities in COVID-19 persist, with increased rates of infection, severe disease, and death among people from minority ethnic groups. COVID-19 vaccination rates also remain lowest in these communities compared with white people in the UK. Among people older than 18 years, the proportion who... have had three COVID-19 vaccinations in England in March, 2022, was lowest among Black Caribbean (38%), Black African (45%), and Pakistani (45%) ethnic groups. These disparities are likely to be attributed to the intersection of key social determinants, including socioeconomic factors such as deprivation, overcrowding, and working patterns and conditions,
alongside discrimination and structural violence in the health-care system and society.
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The updates are based on evidence emerging from the: Ongoing monitoring of the disease. Protection that the population already developed against COVID-19 through previous infection or vaccination. Epidemiological situation, availability of diagnostic tests and access to therapeutic options.