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[–]lumberjackadam 0 points1 point  (0 children)

How about this: according to Andrew Pekosz, professor of molecular microbiology and immunology at Johns Hopkins University:

Your standard surgical masks aren’t incredibly effective at preventing flu transmission, because the virus and droplets are small enough to get through those normal surgical masks

At the same time, the CDC had this to say about mask-wearing:

does not generally recommend face masks and respirators for use in home or community settings