Which of the following is the cause of chicken pox?

The cause of chicken pox is the Varicella zoster virus, which belongs to the herpesvirus family. This virus is specifically known for causing the varicella infection, commonly referred to as chicken pox, characterized by an itchy, vesicular rash and flu-like symptoms.

Varicella zoster virus is highly contagious and is transmitted through respiratory droplets or direct contact with the fluid from the blisters of an infected individual. Once contracted, the virus remains dormant in the body and can reactivate later in life, leading to shingles (herpes zoster).

The other viruses listed are associated with different diseases. Herpes simplex virus is primarily responsible for oral and genital herpes; Cytomegalovirus is known for causing infections in immunocompromised individuals and congenital infections; and Human herpesvirus 6 is associated with roseola infection in young children. Understanding the specific viruses and their associated diseases is critical for effective diagnosis and treatment in clinical practice.