“Contrary to what American officials told us, many studies show that widespread mask-wearing might be a very effective complement to hand-washing, social-distancing and other measures to mitigate the pandemic. Health officials in China, Hong Kong, Singapore and Japan suggest that people wear masks in certain situations — if they’re symptomatic, for instance, or if they’re in crowded, not-very-well-ventilated places, like airplanes. Studies have also shown that mask-wearing (in conjunction with hand-washing) reduces the spread of infection within households or other shared living spaces, like residence halls.
But how to get your hands on a mask, when there are no masks? The internet has a plan: Make your own.”