when chicken pox stop spreading
A person with chickenpox can spread the disease from 1 to 2 days before they get the rash until all their chickenpox blisters have formed scabs. It takes from 10 to 21 days after exposure to a person with chickenpox or shingles for someone to develop chickenpox.aricella-zoster virus also causes shingles. A person with shingles can spread the virus to others who have never had chickenpox or received the chickenpox vaccine. In these cases, the exposed person might develop chickenpox.