Why double-masking can keep you safer from the virus

Dr. Monica Gandhi, who coauthored the article with Marr, recommends that people who are more at risk of severe illness, work indoors around other people, or live in areas where COVID-19 transmission is high wear a cloth mask on top of a surgical one or insert a filter in between two cloth layers.

The idea has been hailed as common sense by Dr. Anthony Fauci, the nation’s top infectious disease expert. The CDC, meanwhile, has not made a recommendation on double-masking and did not respond to questions from BuzzFeed News.

Gandhi, an infectious diseases doctor and professor of medicine at the University of California, San Francisco, said people shouldn’t double-mask if they’re just going out for a walk in an area where they can still keep their distance from others. Double-masking is more important when indoors and in places where distancing is difficult, she added.