An old diagnostic test for plague.
Aronson
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SM
D001256:Astronomy / Q000266:history; D005060:Europe; D049669:History, 16th Century; D049670:History, 17th Century; D049671:History, 18th Century; D049690:History, Ancient; D049691:History, Medieval; D006801:Humans; D010930:Plague / Q000175:diagnosis / Q000266:history*