The common name for the disease caused by the varicella-zoster virus is chickenpox. Chickenpox is a highly contagious viral infection characterized by an itchy rash, fever, and fatigue. It primarily affects children, though adults can also contract it, often with more severe symptoms. The varicella-zoster virus remains dormant in the body after recovery and can reactivate later in life, causing shingles. Vaccination has significantly reduced the incidence of chickenpox, making it less common in many parts of the world.