WHAT IS IT?
Varicella (Chickenpox) is a very contagious disease caused by the varicella-zoster virus (VZV). It spreads easily from infected people to others who have never had chickenpox or received the chickenpox vaccine. Chickenpox spreads in the air through coughing or sneezing. It can also be spread by touching or breathing in the virus particles that come from chickenpox blisters.