Vaccination helps protect unvaccinated people from COVID-19

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A higher level of COVID-19 vaccination was associated with lower rates of SARS-CoV-2 infection in a group of unvaccinated people aged 16 years or younger, a study reports Nature medicine. The findings, based on an analysis of vaccination records and test results from 177 geographically different communities in Israel, from December 6, 2020 to March 9, 2021, show that vaccination against COVID-19 helps protect people. who have been vaccinated and have not been vaccinated.

Clinical trials and vaccination campaigns have shown that Pfizer – BioNTech against COVID-19 is highly effective in the prevention of infections and diseases at the individual and community level. However, it has been suggested that vaccination could also increase transmission due to changes in human behavior. For example, those who have been vaccinated may pay less attention to social distancing or not be quarantined after contacting a person with COVID-19.

The launch of vaccination in Israel began on December 19, 2020 and administered the first dose of the vaccine to almost 50% of the vaccine. within 9 weeks. Determine whether vaccination reduces SARS-CoV-2 transmission among unvaccinated individuals at the center , Roy Kishony, Tal Patalon and colleagues focused their attention on 177 geographically different communities, which had varying vaccination rates (totaling 1.37 million first-dose Pfizer vaccine recipients). BioNTech) and a cohort of people under the age of 16 for whom the vaccine was not yet available. The authors assessed changes in the number of positive COVID-19 tests within each community between set time intervals. They found that, on average, for every 20% increase in the number of people vaccinated in a given population, the number of positive SARS-CoV-2 tests in the unvaccinated population in the same community decreased approximately twice.

The authors warn that their findings do not take into account the possibility of naturally acquired immunity against SARS-CoV-2. They conclude that while the protection observed by the unvaccinated population associated with the vaccine is encouraging, additional studies are needed to understand whether and how vaccination campaigns can support the prospect of herd immunity and eradication. of diseases.


Massive vaccines against COVID-19 can help protect unvaccinated people


More information:
Oren Milman et al, Community-level evidence for protection against the SARS-CoV-2 vaccine from unvaccinated individuals, Nature medicine (2021). DOI: 10.1038 / s41591-021-01407-5

Citation: Vaccination helps protect unvaccinated against COVID-19 (2021, June 11) recovered on June 11, 2021 at https://medicalxpress.com/news/2021-06-vaccination-unvaccinated-covid-. html

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