If a virus takes a week to develop symptoms, and doubles every 3.5 days, that's exactly what do you would expect: after a week 3/4 of the cases are new and too

If a virus takes a week to develop symptoms, and doubles every 3.5 days, that's exactly what do you would expect: after a week 3/4 of the cases are new and too early to detect symptoms. asymptomatic proportion sampled at a moment grows exponentially with incubation period, it means nothing about who will eventually develop symptoms.