Statistics and epidemiology.
D002771:Cholera / Q000266:history; D003141:Communicable Diseases / Q000453:epidemiology; D003327:Coronary Disease; D003710:Demography; D004196:Disease Outbreaks / Q000266:history; D004812:Epidemiologic Methods; D004813:Epidemiology; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007109:Immunity; D008131:London; D008175:Lung Neoplasms / Q000209:etiology; D008954:Models, Biological; D011051:Poliomyelitis / Q000453:epidemiology; D012621:Seasons; D012907:Smoking; D013223:Statistics as Topic; D006113:United Kingdom; D014774:Virulence