FFP2 masks as best everyday protection next to vaccination

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Wearing masks indoors in public places offers the greatest protection against Covid-19, along with vaccination. An observational study of everyday life conducted in the U.S. state of California over a period of months through December 2021 shows: FFP2 masks in stores, restaurants, public transportation, etc., reduce the risk of infection by 83 percent.

The study included just over 3,000 people between February 18 and December 1, 2021, after random selection and without age restriction. Wearing masks of various forms was queried in 652 individuals who had tested positive for SARS-CoV-2 by PCR during the observation period. This was compared with data from 1,176 people without infection or known contact with infected individuals.

Even with a simple fabric mask in indoor public spaces, 56 percent fewer infections with covid-19 were recorded among 534 people who reported the type of protection used in telephone interviews. However, this difference was not statistically significant. Use of mouth-to-nose protection yielded a 66 percent reduction. FFP2 masks, as prescribed in Austria, had an 83 percent effectiveness.

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