Columbia subject headings:
Epidemiology--Early works to 1800.
Fever--Early works to 1800.
Measles--Early works to 1800.
Medicine--Early works to 1800.
Harvard subject headings:
Epidemiology--Early works to 1800.
Fever--Early works to 1800
Measles--Early works to 1800.
Medicine--Early works to 1800
Princeton subject headings: