You may be able to pass on the virus, even if you don't feel sick yet. Medically reviewed by Kashif J. Piracha, MD The flu incubation period is the time from when you come into contact with the flu ...

Medically reviewed by Steffini Stalos, DO The COVID-19 incubation period typically ranges from 2- 14 days but averages 3-5 days. COVID is most contagious from two days before to three days after your ...