Masks may help prevent people who have COVID-19 from spreading the virus to others. Wearing a mask will help protect people around you, including those at higher risk of severe illness from COVID-19 and workers who frequently come into close contact with other people (e.g., in stores and restaurants). Masks are most likely to reduce the spread of COVID-19 when they are widely used by people in public settings. The spread of COVID-19 can be reduced when masks are used along with other preventive measures, including social distancing, frequent handwashing, and cleaning and disinfecting frequently touched surfaces.
Masks with Exhalation Valves or Vents
CDC does not recommend using masks if they have an exhalation valve or vent. The purpose of masks is to keep respiratory droplets from reaching others to aid with source control. Masks with one-way valves or vents allow exhaled air to be expelled out through holes in the material. This can allow exhaled respiratory droplets to reach others and potentially spread the COVID-19 virus.
How Can I Make a Mask?
Simple masks can be made at home and may help prevent the spread of COVID-19. Here are Sew and No SewInstructions