👉 Varicella, also known as chickenpox, is a virus that causes chickenpox in humans and other animals. It typically manifests itself as itchy rash on the skin caused by tiny red bumps or blisters, which can spread to other parts of the body. Symptoms may include fever, chills, fatigue, and joint pain. Treatment involves antiviral medications and sometimes corticosteroids if severe symptoms persist for more than a week.
