The three categories of HIV viral load #SayZero

With proper adherence, antiretroviral treatment (ART also called antiretrovirals or ARVs) can reduce HIV to such low levels that the virus can no longer be detected in normal blood tests. This is called having an ‘undetectable’ viral load.  

An undetectable viral load means there is zero chance of passing HIV on through sex. This is also known as undetectable = untransmittable (U=U).