Columbia subject headings:
Communicable diseases--Environmental aspects.
Communicable diseases--Epidemiology.
Communicable diseases--Etiology.
Communicable diseases--Social aspects.
Medical geography.
Microbial ecology.
World health.
Harvard subject headings:
Communicable diseases
Diseases--Causes and theories of causation
Environmentally induced diseases
Medical geography.
World health.
Princeton subject headings:
Communicable diseases.
Diseases--Causes and theories of causation.
Environmentally induced diseases.
Medical geography.
World health.