"Haygarth, John"@en . "John Haygarth (1740 \u2013 10 June 1827) was an important 18th-century British physician who discovered new ways to prevent the spread of fever among patients and reduce the mortality rate of smallpox."@en . "British doctor" . . "1740Z"^^ . "1827-06-10Z"^^ . . "1827Z"^^ .