We know face masks protect others, but they might also filter out viral particles making their way to *your* lungs.
While this evidence is indirect, the researchers drew on it to hypothesize that face masks could play a role in increasing the proportion of cases that are asymptomatic, which, though problematic for transmitting the virus, could help communities reach herd immunity without large amounts of severe cases.
And it could even go beyond that, they suggest. Again noting that the evidence was indirect and likely impacted by multiple factors, the researchers nonetheless noted that countries with population-level masking have had more success in."Indeed, even when cases have resurged in these areas with population-based masking upon re-opening , the case-fatality rate has remained low with opening but masking," the researchers wrote.
Again, asymptomatic infection is a double-edged sword. It can increase the spread of the virus, researchers wrote, but at the same time,"exposing society to SARS-CoV-2 without the unacceptable consequences of severe illness . . . could lead to greater community-level immunity and slow down spread as we await a vaccine.
Much of the evidence cited doesn't establish a cut-and-dry, cause-and-effect correlation between masking and a lower viral dose, and between masking and asymptomatic infections. In aabout the conclusions, while others said it makes"complete sense" that masking would protect the wearer to some degree.
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