A complete list of the HIV test kits approved in the U. They may have been designed for use by medical professionals and be difficult for others to use correctly. Anyone who has been sexually assaulted or has had a high-risk exposure to HIV should consider taking post-exposure prophylaxis PEP and getting an HIV antigen test that can detect infection sooner than standard antibody testing. If you actively engage in behavior that puts you at risk for HIV infection, or your partner engages in such behavior, then you should consider testing on a regular basis. To find a lab for a blood sample in the United States, people can: But it may take up to twelve weeks for infections to be detected. How do I take the blood sample? This test is only available in certain parts of Europe, meets European quality standards has CE marking , and uses blood to test for HIV in about 15 minutes.