Columbia subject headings:
Harvard subject headings:
AIDS (Disease)--Prevention
Communicable diseases--Prevention
Epidemics--Prevention.
SARS (Disease)--Prevention.
Vaccines
Zika virus--Prevention.
Princeton subject headings:
AIDS (Disease)--Prevention.
Communicable diseases--Prevention.
Epidemics--Prevention.
SARS (Disease)--Prevention.
Vaccines.
Zika virus--Prevention.