![]() ![]() ![]() However, healthy children may also develop serious complications and even die from varicella. Varicella severity and complications are increased among immunocompromised persons, pregnant women, children younger than 1 year of age, and adults. Varicella is characterized by a pruritic, maculopapular, vesicular rash that evolves into noninfectious dried crusts over a 3- to 7-day period. The incubation period for varicella is 10–21 days, most commonly 14–16 days. Transmission occurs from person to person by direct contact with persons with either varicella or herpes zoster (shingles), inhalation of aerosols from vesicular fluid of skin lesions of persons with varicella or zoster, and through infected respiratory secretions that also may be aerosolized. Varicella is highly infectious, with secondary infection occurring in 61%–100% of susceptible household contacts. Humans are the only source of infection for this virus. ![]() Varicella (chickenpox) is a febrile rash illness resulting from primary infection with the varicella-zoster virus (VZV). Manual for the Surveillance of Vaccine-Preventable DiseasesĪuthors: Adriana Lopez, MHS Jessica Leung, MPH Scott Schmid, PhD Mona Marin, MD Disease Description ![]()
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