Complications may include:
- Skin infections, including necrotizing fasciitis (flesh eating disease)
- pneumonia and
- central nervous system problems.
A person is contagious from about 2 days before spots appear and until all blisters have crusted over, which is usually 5 days after the first blisters appear.
People who are contagious should stay away from child care, school, or work to avoid spreading chickenpox to others.
After you have had chickenpox, you are not likely to get it again. However, the virus stays in your body long after you get over the illness. If the virus becomes active again, it can cause a painful rash called shingles or zoster.