Step 1 : Introduction to the question "What is another name for the disease known as varicella?"
Chickenpox, also known as varicella, is a highly contagious disease caused by the varicella-zoster virus. The disease results in a characteristic skin rash that forms small, itchy blisters, which eventually scab over. Chickenpox used to be very common in the United States. You can only become immune to Chicken pox through already having the disease and developing antibodies to it or through vaccination, which has only been introduced in the last decade. Since immunization the number of infections in the United States has decreased nearly 90%.