PARTNER2 study confirms U=U message

New evidence from phase 2 of the PARTNER study extends U=U (undetectable=untransmittable) message to gay men. It confirms that HIV cannot be passed on in (any) couple where one partner has an undetectable viral load.

The study of nearly 1,000 gay male couples who had sex without using condoms, where one partner was HIV positive and on effective treatment and the other was HIV negative, reports no cases of within-couple HIV transmission over eight years.

Results of the PARTNER2 study, coupled with the PARTNER study, give undisputable scientific evidence that effective treatment stops HIV transmissions, adding to the body of research underpinning the U=U message.