People should be wearing cloth face coverings to prevent the spread of COVID-19, the Centers for Disease Control said Friday.

These homemade masks should cover the nose and mouth and be worn whenever you’re in a community setting, like going to the supermarket or pharmacy. The CDC has a helpful guide for DIY-ing a mask with materials you’d have at home.

While surgical masks and N95 respirators should be saved for healthcare workers, the idea is that a simple cloth covering could prevent asymptomatic people from spreading the disease in situations where it’s hard to maintain social distance.

“These are not intended to prevent you from getting the virus, they are intended to prevent other people from getting the virus from you, Dr. Howard Forman, professor of management, public health, economics and radiology at Yale University and Yale School of Medicine, tells CNBC Make It. “If…