Protection through therapy (also known as Treatment as Prevention/TasP) prevents HIV infection during sex if one partner is HIV-positive and the other is HIV-negative.
The method is based on hiv-positive people taking HIV drugs and thus suppressing HIV reproduction in a stable manner. If HIV has not been detectable in their blood for at least half a year, there are hardly any viruses left in other bodily fluids such as semen and vaginal fluid. HIV can then no longer be transmitted even during sex.
A condom can be dispensed with under these conditions and is still protected from HIV. Protection through therapy is therefore also a safer sex method.
Important: The medications must be taken regularly and the effect of the medication must be checked regularly by a doctor.