Final answer:
The disease state of Varicella is chickenpox, a condition characterized by fever, chills, and a pustular rash, caused by the varicella-zoster virus.
Step-by-step explanation:
The symptom or disease state of Varicella is c) Chickenpox. Chickenpox, also known scientifically as varicella, is caused by the varicella-zoster virus, which is part of the herpesvirus family. Chickenpox is characterized by a fever, chills, and a pustular rash of lesions that burst and form crusty scabs. While this disease is often mild and self-limiting in children, adults may experience more severe symptoms, including complications such as pneumonia. Furthermore, after chickenpox, the varicella-zoster virus becomes latent within the body and can later reactivate in the form of shingles, which is a painful, localized rash that usually occurs on one side of the body.