how long are people contagious for with chickenpox
Chickenpox can be caught from the fluid in the blisters of someone with shingles, though this is rare. The person with chickenpox is contagious from the beginning of the illness (up to 2 days before the spots appear) until about 5 days after the first spots appear. So long as there are no new blisters or moist crusts on spots, the person will not be contagious even if there are still crusts on the skin. Chickenpox is very contagious (easy to catch). Over 90% of close contacts (such as other family members) will get chickenpox if they have not already had it or not been immunised. How long does it take to develop? Chickenpox usually takes around 14-15 days to develop after contact with someone who has it (range 10 to 21 days).