Face masks are important for slowing the spread of COVID-19 and protecting against smoke. Per- and polyfluoroalkyl substances (PFAS) are added to many products to repel fluids, but their presence in face masks hasn't been thoroughly studied. Now, researchers have found that most face masks tested contain low or negligible levels of PFAS, except for one marketed to firefighters, which could pose health risks in certain situations.
source https://www.sciencedaily.com/releases/2022/03/220330103215.htm
source https://www.sciencedaily.com/releases/2022/03/220330103215.htm
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