Columbia subject headings:
Epidemiology--Periodicals.
Immunity--Periodicals.
Microbiology--Periodicals.
Harvard subject headings:
Epidemiology--Periodicals
Immunity--Periodicals.
Microbiology--Periodicals
Princeton subject headings:
Epidemiology--Periodicals.
Immunity--Periodicals.
Microbiology--Periodicals.
Periodicals.