Final answer:
The varicella virus causes chickenpox, a disease commonly known as varicella.
Step-by-step explanation:
The correct option : 2
The varicella virus is the causative agent of chickenpox, also known as varicella, which was once a widespread childhood disease. The varicella-zoster virus, which belongs to the herpesvirus family, is transmitted by direct contact or inhalation of material from the skin lesions. While the disease is usually mild and self-limiting in children, it can cause more severe complications in adults, including pneumonia and birth defects if a pregnant woman is infected.
Furthermore, one complication associated with chickenpox in children is Reye syndrome. After the initial chickenpox infection, the virus can remain latent in the body and may later reactivate as shingles, which presents as a painful, localized rash.