To determine if you are infected with HIV (Human Immunodeficiency Virus) which is the virus causing AIDS (Acquired Immunodeficiency Syndrome), you must do a test by taking a blood test either in your usual practitioner (reimbursed by Social Security at the usual rate), in a family planning center (free and anonymous) or in a medical analysis laboratory (reimbursed at 100%).
Since 2010, it is possible to do a rapid biological orientation test (Trod) which will indicate in half an hour if you are infected with the virus and thanks to a simple drop of blood taken from your fingertip. If the test is positive, it will be confirmed by a blood test.
If you have taken a real risk (unprotected sex with a stranger, broken condom, sharing a syringe or injection equipment, injury with an object soiled with blood), it is necessary to go within 48 hours to one of the places mentioned above. The doctor or healthcare professional who will take care of you will assess the real risk of infection with you and, if necessary, put you on emergency anti-HIV treatment.
Emergency HIV treatment is taken for 28 days and is basically the same treatment as that taken by people with AIDS.
In any case, if you are in doubt, take a screening test as soon as possible. The reliability of the test is 99.9% six weeks after taking the risks.