evidence: - Face Masks and COVID-19 Prevention: - Overview: face masks help reduce the spread of COVID-19 (and influenza). Reason: people with COVID-19 can have no symptoms, but still spread the virus. - Sick people should always wear a face mask, if you are around other people or need to leave the home. Example: for medical visits. Exception: patients with trouble breathing in a mask (CDC). Consider a loose face covering, such as a bandana.