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Abstract
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The past 2 decades have taught us
that HIV prevention can work. We now
have evidence from places as diverse
as Senegal, Thailand, Uganda, and
Australia that concerted HIV prevention
efforts at the national level have
resulted in the maintenance of low
seroprevalence rates where they otherwise
would have been expected to rise.
We are beginning to observe declining
rates of HIV prevalence and incidence
in places and populations with
historically high rates—for example,
injection drug users in New York City.
This trend points to the long-term impact
of prevention efforts in those
communities.