The rules on face masks are straightforward but have become muddled by the changing of guidelines. Initially, it was said that face masks are pointless when worn by the public. However, the World ...
Researchers at the Maxplank Institute of Chemistry in Germany said on May 20, 2021, 'Even with a simple surgical mask, the spread of the new coronavirus (SARS-CoV-2) is sufficiently prevented in most ...
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