Clinical Challenge: A Rapidly Spreading Rash and Fever

A 44-year-old Hispanic man presents for evaluation of a rash of 2 days' duration. Lesions originated on his face and rapidly spread to his trunk, back, and upper extremities. When the rash began, he had a fever of 101° F. The patient states that the rash is very itchy. His immunization status is unknown. Physical examination reveals disseminated vesicular lesions ...