an acute contagious disease caused by herpes varicella zoster virus; causes a rash of vesicles on the face and body

See Chickenpox.

Varicella (chickenpox) is an infection caused by the varicella-zoster virus, which belongs to the herpes group of viruses.

Varicella is a 1999 work of interactive fiction by Adam Cadre, distributed in z-code format as freeware. It is set in an alternate history which features roughly modern technology mixed with Renaissance-style principalities and court politics. The player character is Primo Varicella, palace minister in Piedmont, who has to get rid of several rivals for the regency following the death of the king.

Chicken pox.