Columbia subject headings:
Drug addicts--Health and hygiene.
HIV infections--Prevention.
Hypodermic needles--Design and construction.
Intravenous drug abuse.
Needle sharing.
Harvard subject headings:
AIDS (Disease)--Transmission--United States.
AIDS (Disease)--United States--Prevention
HIV infections--Transmission--United States.
HIV infections--United States--Prevention.
Hypodermic needles--Government policy--United States.
Princeton subject headings:
Drug addicts--Health and hygiene.
HIV infections--Prevention.
Hypodermic needles--Design and construction.
Intravenous drug abuse.
Needle sharing.