Recently, the Centers for Disease Control and Prevention (CDC), Africa CDC, and a number of country governments have advised people to wear non-medical masks in public when community transmission of COVID-19 may be widespread. Faced with shortages of personal protective equipment (PPE)—and in order to reserve the use of medical-grade masks for health care workers—homemade cloth masks can help reduce the spread of large droplets if used correctly. PATH has reviewed and consolidated guidance on the use of homemade cloth masks for use in communities.