The hetrosexual contact is specifically defined as; "*Heterosexual contact with a person known to have, or to be at high risk for, HIV infection."
Source
Conclusion; HIV/AIDS is not everyone's problem.
“Heterosexual Contact” is almost entirely bad data.
“Claimed Heterosexual Contact” is more accurate. When investigators look into the real causes in such cases, they invariably find concealed homosexual activity or drug use.
(Of course in Africa, the prevalence of genital sores from other STDs is a vector for hetero transmission that does not exist in the developed world (even the ghetto).
Also, it is a virtual medical impossibility for a healthy male to be infected by sex with an infected woman.
And a healthy woman is VERY unlikely to infected by an infected man, unless engaging in “gay-style” sex, to put it politely. (And the silence on that issue is a medical crime, since it is the type of sex, not merely the fact that it is “sex” that makes the difference.)
But virtually all of these “heterosexual” cases are those whose partners use drugs or receive gay-style sex.