New study suggests wearing a face mask at home could help limit spread of COVID-19

a person sewing cloth masks

Researchers from China, the U.S., and Australia carried out the retrospective cohort study between Feb. 28 and March 27, surveying 335 people from 124 families in Beijing, China, that had lived in the same house for at least four days prior and for more than a day after a person who had tested positive for COVID-19 started showing symptoms.