And to boil down the essential point here,

HIV is spread by vaginal sex. Quite effectively so.

Straight adolescents and young adults are contracting STI's at a very high rate and so are having high rates of unprotected intercourse.

The only reason that HIV is not more prevalent is that those people, behaving as they do, have not yet had sex with an HIV+ person. That is good fortune, because the number of straight carriers has been low, historically.

The numbers of straight carriers in this country has grown greatly (regardless of origin) over recent years.

The number of UK-acquired cases has grown 500% over recent years.

African people may tend to find partners in their own communities so the disease may have been contained to a large extent in what amounts to an African social/sexual network. That is de Cock's point, by the way, about the importance of networks in edpidemiology.

Black and white people (outside your racist fantasies) do have sex together.

And you say their is "No risk to our heterosexual population"

As in no risk (at all).

Really, Keith?

You could exchange African for Gay, in that analysis - it is the sexual/social network that contained HIV in gay men in this country. Straight people bevave just as badly as gay people, it's just that the disease emerged in one network, whose members do not find partners in the other network.

As I have been saying all along.