There were 43,158 new cases of HIV reported in 2001 in the U.S.
The number of cases is rising.
In 2000, there were 40,000 new cases.
Exactly 50% (half) of all these new cases of HIV in 2000 were among 15-24 year-olds.
New strains of HIV are appearing, and the medications presently being used are not as effective over time.