There are quite a few studies that have shown that undetectable men don't transmit the virus.
Apologies for a sidebar/semi-hijack.
What seldom gets mentioned is that the original studies that were done looked at
heterosexual couples where one person was HIV+ and the other person was HIV- (discordance). These couples
have a dilemma when they want to have children because there's no means to remove HIV from semen and logically, semen is needed to conceive a child. What the studies have found is that it is possible for an HIV+ man with a low viral load to have unprotected sex with his female partner without transmitting HIV to the woman or the fetus.
The press covered a lot of original studies without mentioning that the couples that were studied were male-female couples. They also didn't mention that the studies were observational studies of people in SubSaharan Africa. Studies that didn't show positive results (
like FEM-PrEP) didn't get as much coverage.
Recently, there have been studies that have focused more on men who have sex with men (MSM). Those studies have been promising but that are still largely observational studies.
The studies, for those who are interested in such stuff are:
Partners PrEP - heterosexuals in Kenya and Uganda
TDF2 - heterosexuals in Botswana
Fem-PrEP - heterosexuals in SubSaharan Africa
VOICE - heterosexuals in SubSaharan Africa
Bangkok Tenofovir Study - IV drug users in Thailand
iPrEx study - MSM in Brazil, Ecuador, Peru, South Africa, Thailand and the United States
PROUD - MSM in the UK
IPERGAY - MSM in France and Canada
There are some more recent studies that are smaller. Many of these can be found on the
HTPN,
BetaBlog or
AIDSMap sites.