In this real sneeze, droplets and aerosols (really tiny droplets) become airborne. Recent research finds the coronavirus can endure up to 3 hours in aerosols, and other research shows aerosols can remain in the air for many minutes or more, and then be inhaled by others. Image: CDC

Should You Make Your Own Facemask?

Is a homemade mask a useful complement to other COVID-19 preventive measures, or an ineffective measure that offers false hope?