Oh, ok, you know your viruses. So mostly a few days, or distributed over that period?
distributed over that period but most toward the short end. Think about when the common cold goes through your family
Looks like a signoid curve fig 2: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4327893/ SARS type coronavirus shows 2 to 10 days with a more gradual slope than most. Probably a result of a lot of differences in the human immune response to a rare virus.