how do i know when no longer infectious with chicken pox
Best Answer: Chicken pox is no longer contagious after all the lesions have scabbed over, this is usually about a week after the rash first appears.Source(s): wowaddict Â· 6 years ago. Thumbs up.o my little sister nine years old got the chicken pox's about the a week ago and she even had the vaccine to prevent it but still got that's because her mom(not my Mom By the way) had the shingles so she was exposed quite often so I stayed at my actual moms house for a few extra days so I would not be...