What is your source on 4-6 days contagious incubation? Estimates I've seen were lower. This critical period is elsewhere described as (incubation - latent):

What is your source on 4-6 days contagious incubation? Estimates I've seen were lower. This critical period is elsewhere described as (incubation - latent): https://en.m.wikipedia.org/wiki/Incubation_period https://en.m.wikipedia.org/wiki/Incubation_period