Are any genders / races more likely to get aids?

Yes: The differences aren't biological. In the us, men are more likely to be infected because of transmission among gay men. But in africa, where's it's mostly a heterosexual epidemic, there's no significant gender difference. In the us, blacks are disproportionately infected compared to whites, but this is not based on a biologic predisposition. Hiv affects all races and both genders.