Columbia subject headings:
Harvard subject headings:
Emergency management--United States
Epidemics--United States--Prevention.
Health planning--United States.
Influenza vaccines--United States.
Influenza--Government policy--United States.
Influenza--United States--Prevention.
Vaccination--United States
Princeton subject headings:
Emergency management--United States.
Epidemics--United States--Prevention.
Health planning--United States.
Influenza vaccines--United States.
Influenza--Government policy--United States.
Influenza--United States--Prevention.
Vaccination--United States.