Sources: Donald A. Henderson, MD, and the U.S. Centers for
Disease Control and Prevention (CDC). Adapted with permission. All rights
0 to 2 days of mild illness pass before the rash
2 to 3 days of severe illness pass before the rash
Lesions first appear on the face or trunk.
Lesions first appear in the throat or mouth, then on the
face, or on the upper arms.
Lesions develop in successive fashion. While some are new,
others are crusting over (in "crops").
Lesions develop at the same time, and they look alike on any
one section of the body, such as the abdomen, arms, or face.
Lesions change rapidly, crusting over within 24
Lesions change slowly, scabbing over after 9 to 15
Lesions sit on the skin surface like a "dewdrop on a rose
Lesions become firm, dome-shaped, and deep in the
Rash rarely develops on palms and soles.
Rash commonly develops on palms of the hands and soles of the
Lesions are most concentrated on the torso, with fewest on
the hands and feet. Lesions can affect the face and scalp, but rarely affect
the entire body equally.
Lesions are most concentrated on the face, hands, and
December 16, 2010
E. Gregory Thompson, MD - Internal Medicine & Christine Hahn, MD - Epidemiology
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