Which race/ethnicity category has the highest number of cases diagnosed with hiv/aids?

HIV is known as Human immunodeficiency virus and it is a virus that attack CD4+ cell of humans which results into weakening of the immune system of the infected person. However, Black/African ethnic group have being accounted to have the highest proportion of new HIV diagnoses and those who have ever received an AIDS diagnosis when compared with other ethnicities/races group.

they deliver oxygen to the blood

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."