The epidemic as a social event.
D002908:Chronic Disease; D003695:Delivery of Health Care; D004196:Disease Outbreaks / Q000266:history; D004467:Economics; D006801:Humans; D009026:Mortality; D010946:Plants, Medicinal; D011057:Politics; D011635:Public Health Administration; D012922:Social Change; D014481:United States