Mask-querade!   This is my compilation of information on masks, especially cloth masks, and their use to prevent the spread of covid-19. First thing is to remember masks reduce infection in two ways: inward-facing, and outward-facing.     Medical professionals and first responders who are necessarily exposed to infected people badly need inward-facing protection.   Disrupting infection chains only requires outward-facing protection - IF everyone, or almost ever
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