Which is the most risky mode of sexual transmission for HIV? Answer: square The effectiveness of antiretrovira therapy is measured by Answer: square

1. The most risky mode of sexual transmission for HIV is:Answer: Unprotected sexual intercourse (vaginal or anal sex without the use of condoms or other barrier methods).2. The effectiveness of antiretroviral therapy is measured by:Answer: Viral load tests, which measure the amount of HIV in the blood.