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J Chin Med Assoc. 2011 Jun;74(6):280-2. doi: 10.1016/j.jcma.2011.04.010. Epub 2011 May 12.

Pityriasis rosea following influenza (H1N1) vaccination.

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Department of Dermatology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC.


Pityriasis rosea is a distinct papulosquamous skin eruption that has been attributed to viral reactivation, certain drug exposures or rarely, vaccination. Herein, we reported a clinicopathlogically typical case of pityriasis rosea that developed after the H1N1 vaccination. With a global H1N1 vaccination program against the pandemic H1N1 influenza, patients should be apprised of the possibility of such rare but benign skin reaction to avoid unnecessary fear. Furthermore, a brief review of the current reported skin adverse events related to the novel H1N1 vaccination in Taiwan is presented here.

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