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Chris's Digital Detritus
Videotext for the twenty first century.
Effectiveness of surgical masks against influenza bioaerosols – Journal of Hospital Infection
Do N95 respirators provide 95% protection level against airborne viruses, and how adequate are surgical masks? – PubMed – NCBI
The First Randomized, Controlled Clinical Trial of Mask Use in Households to Prevent Respiratory Virus Transmission – International Journal of Infectious Diseases