Viral Infection

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Overview

Roseola infantum (also known as exanthema subitum, or sixth disease) is the most common, contagious viral rash in children under 3 years of age. Infection results in lifelong immunity. This mild, self-limiting infection resolves rapidly.

Causes

Human herpesvirus 6 (HHV-6) and human herpesvirus 7 (HHV-7) cause roseola.

Signs and Symptoms

Following an incubation period of 1 to 2 weeks, a high fever (102º–105º F) develops. Seizures sometimes occur due to...Read the full article