Quote (Ghot @ Jul 30 2017 06:50am)
How can someone be HIV positive AND undetectable?
Still, there is no logical or sensible argument for having sex with someone and not telling them you have an STD. (I'm including HIV here)
Undetectable means that there's so few copies of the virus active within the person's body that an HIV test can no longer detect it. There needs to be a massive amount of copies of the virus for it to actually be transmissible, and the number of copies within folks who are undetectable is so low that transmission can't occur.
They still have HIV though because HIV hides within reservoirs within the body (essentially hibernating immune system cells), and this is the last bastion of cure research is to figure out how to safely get these hiding HIV cells to activate so that HIV medication can affect them without damaging healthy cells. It's why people have to take HIV medication for their entire lives at the moment, because if they stop the medication even though they're undetectable, the HIV in the reservoirs activate and the virus rebounds.
Quote (BardOfXiix @ Jul 30 2017 06:51am)
I'm going to need a source for this one. That seems like an impossible situation.
Those methods are only effective if you have knowledge that your partner is H.I.V. positive.
That's true for PEP, yes, but not for PrEP. PrEP is a daily medication that people take, so it's viewed as essentially like birth-control for HIV, and so people are taking it before they're even sexually active independent of the HIV status of future partners (including knowledge of their status).
There's been very large studies, namely the PARTNER Study where the "undetectable = untransmissible" message has come from. They've had initial findings and additional studies are still on-going. However:
http://i-base.info/htb/30108This post was edited by Handcuffs on Jul 30 2017 01:08am