Varicella (chickenpox) is an acute infectious disease. It is caused by varicella-zoster virus (VZV), which is a DNA virus that is a member of the herpesvirus group. After the primary infection, VZV stays in the body (in the sensory nerve ganglia) as a latent infection. Primary infection with VZV causes varicella.

Where does varicella start?

The rash may first show up on the chest, back, and face, and then spread over the entire body, including inside the mouth, eyelids, or genital area. It usually takes about one week for all of the blisters to become scabs. Other typical symptoms that may begin to appear one to two days before rash include: fever.

What kills varicella virus?

Zovirax (acyclovir) This is the main antiviral drug prescribed for chickenpox. It’s usually taken by mouth, but may be given intravenously (by IV) in people with severe complications.