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Study CONCLUSIONS state: "The wide variation in penetration levels for room air particles, which included particles in the same size range as viruses CONFIRMS THAT SURGICAL MASKS SHOULD NOT BE USED FOR RESPIRATORY PROTECTION."
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC73573

Filtration Performance of FDA-Cleared Surgical Masks

www.ncbi.nlm.nih.gov

Filtration Performance of FDA-Cleared Surgical Masks

Ashortage of NIOSH-approved respirators is predicted during an influenza pandemic and other infectious disease outbreaks. Healthcare workers may use surgical masks instead of respirators due to non-availability and for economical reasons. This study