To slow the transmission of COVID-19, the U.S. Centers for Disease Control and Prevention (CDC) has recommended that people use cloth face coverings in public settings where social distancing is difficult to maintain, such as a grocery store.
The new recommendations come as cases continue to rise and experts say that as many as 20 percent to 50 percent of those infected may show no symptoms but still spread the disease.
On the streets of many U.S. cities, people are sporting a hodgepodge of face coverings, from old N95 respirators found in the garage to carefully stitched cloth masks to casually wrapped scarves. As more people try to heed the CDC’s advice, many are uncertain about how to properly wear a face mask and how exactly they help.
UC San Francisco emergency care physician Jeanne Noble, MD, explains why everyone should wear a face mask and demonstrates step-by-step how to safely don and doff masks of different types.