We are going to have to ask for the experts to comment on this one. The BBC reports (thanks for the tip Mytri):
Indians infected with the AIDS virus are more likely to contract the disease than people in the west, a new study has found.
Scientists say that Indians have lower immunity to the virus because they have genes that hasten the disease.
India says more than five million of its citizens are infected with the HIV virus, second only to South Africa.
Activists say the number of Indians affected by HIV/Aids is much higher than the government says.
Scientists at India’s premier medical school, the All India Institute of Medical Sciences (AIIMS), studied 200 people with HIV infection and 2000 healthy people over two years for the study.
I always try to look at genetic anomalies in terms of evolutionary pressures. In cases where none are obvious I just shrug my shoulders and wait for an explanation.
“Protective genes are low among Indians while the harmful genes are more common,” Dr NK Mehra, head of the study told the BBC.
Ummmm. That explanation doesn’t quite make it clear (to me at least). In a somewhat related story the Hindustan Times reported last week that Indians and Pakistanis in England have the lowest number of sexual partners (ouch).