Heeding the warning signs of chickenpox.
D035843:Biomedical Research; D002644:Chickenpox; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D012899:Smallpox / Q000517:prevention & control*; D012901:Variola virus
SMALLPOX/prevention and control