The thing I cannot fathom is what exactly is weird about this statistic. People under 30 tend to have a lot of sex, with varied partners. They also comprise a pretty large chunk of the 'old enough to have sex' age bracket. Why would anybody be shocked that 1/3 of HIV diagnoses are in this age group? Clearly finding ways to combat HIV is good, but how can this be considered a shocking sort of statistic? Were there really a lot of people out there who figured that everyone getting HIV was over age 30?