Final answer:
The time frame for testing for HIV after risky sexual contact can vary depending on the type of test being used. It is recommended to get tested within a few weeks using a test that detects viral RNA, or wait for at least 3 months to get tested using antibody tests.
Step-by-step explanation:
The time frame for testing for HIV after risky sexual contact can vary depending on the type of test being used. The most common antibody tests may take up to 3 months after the initial infection for antibodies to show up in the blood. However, a test that identifies viral RNA can detect the virus before antibodies develop, usually within a few weeks of infection.
It's important to note that the risk of transmission is higher during the early months of infection when the infected person usually has the greatest viral load. However, the risk can be substantially reduced by early detection and prompt treatment with antiretroviral medications within two or three days of the incident.
In summary, it is recommended to get tested for HIV after risky sexual contact within a few weeks using a test that detects viral RNA, or wait for at least 3 months to get tested using antibody tests.