Undetectable viral load. For someone living with HIV, this is when medical treatment is successful enough that tests no longer detect the virus in the body. Someone with an undetectable HIV viral load cannot pass the virus on to someone else, because there isn’t enough of the virus left in the body for that, even if the person isn’t actually cured. Viral loads aren’t specific to HIV, and it’s a term you can hear in medical discussions about other kinds of viruses.

viral load, viral loads