I think you're thinking of "U=U", which stands for "undetectable = untransmittable". At this point in the epidemic, most transmission happens from people who do

I think you're thinking of "U=U", which stands for "undetectable = untransmittable". At this point in the epidemic, most transmission happens from people who don't know their status, and not from people who are known to be HIV+ and are in treatment.