There is a different time period for the visibility of blisters of chicken pox which is 4 to 7 days in children and after the fifth day the new blisters got appeared on the body of . Jul 11, · Autism is a real disability that is profoundly restrictive. You cannot have hordes of undiagnosed autistic adults walking around untreated any more than you could have blind people going around unnoticed. Measles is a very contagious disease caused by a virus. It spreads through the air when an infected person coughs or sneezes. Measles starts with fever. Soon after, it causes a cough, runny nose, and red eyes. Then a rash of tiny, red spots breaks out. It starts at the head and spreads to the rest.