By Megan Redshaw

Children’s Health Defense

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A new peer-reviewed study shows two doses of an mRNA COVID-19 vaccine yield negative protection against symptomatic SARS-CoV-2 infection, while previous infection without vaccination offers about 50% immunity.

The findings, published June 15 in the New England Journal of Medicine (NEJM) analyzed information from more than 100,000 Omicron-infected and non-infected residents in Qatar from Dec. 23, 2021, through Feb. 21, 2022.

The authors compared the effectiveness of the Pfizer and Moderna COVID-19 vaccines, natural immunity from previous infection with other variants and hybrid immunity (a combination of infection and vaccination) against symptomatic Omicron infection and severe, critical and fatal disease.

Researchers found those who had a prior infection but had not been vaccinated had 46.1% and 50% immunity against the BA.1 and BA.2 Omicron subvariants more than 300 days after the previous infection.

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Notes from APS Radio News

According to statistics published by Statisa and Our World in Data, the countries with high rates of vaccine participation also have seen increases in the number of virus cases during the past year.

APS Radio News cross-referenced data of the number of virus cases by country and as a function of time to vaccine participation rates by country measured over a period of time.

Statista, which is an award-winning service that compiles and analyzes various types of data for corporations and governments, has published the number of virus cases by country as a function of time.

Our World in Data has published information pertaining to vaccine participation rates by country.