The chickenpox virus is present in the mucous membrane of the patient’s upper respiratory tract and in the herpes fluid, and is contagious from 1-2 days before the onset of the disease until the rash is completely crusted over, so chickenpox patients are not contagious after complete crusting. The majority of chickenpox patients have scabs that fall off. It is not possible to leave a scar, so scarring is extremely rare. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. The incubation period of chickenpox is about two weeks on average, and susceptible individuals can obtain specific immunity through chickenpox vaccination.