These tests may also be called " viral load tests." They can usually find an HIV infection as soon as 10 to 33 days after infection. NAT tests (nucleic acid tests) look for HIV in a sample of your blood taken from a vein and tested in a lab.Like rapid tests, these tests can start finding HIV 18 to 90 days after infection. At-home tests, or mail-in tests, allow you to collect blood from your finger at home to send to a lab for testing.This test can find HIV infections starting between 18 days to 90 days after you were infected. Rapid tests use a drop of blood from your finger.Lab tests that use a blood sample from a vein can find an HIV infection as soon as 18 to 45 days after you were infected.After an HIV exposure, antigens will show up in your blood sooner than antibodies: An antigen is the part of the HIV virus that triggers your immune system to fight the infection. They look for HIV antibodies and antigens in your blood. HIV antibody/antigen tests are the most commonly used HIV tests.With mail-in tests, you collect a drop of blood from your finger to send to a lab for testing. At-home tests include rapid self-test kits with everything you need to collect and test a sample of saliva on your own.They provide results in about 30 minutes. Rapid tests use blood from your finger, saliva, or urine.Test results are usually ready a few days after your blood sample is taken. In general, lab tests can find antibodies sooner after infection than other HIV antibody tests. Lab tests use a blood sample taken from a vein.An antibody test may find HIV antibodies as early as 23 days after infection, but it may take as long as 90 days before your body makes enough antibodies to show up on this test.Īntibody tests can be done in different ways: Some people make antibodies faster than others. HIV antibodies are disease-fighting proteins that your immune system makes when you have an HIV infection. HIV antibody tests look for HIV antibodies in your blood, saliva (spit), or urine (pee).The time between infection and when a test can find HIV depends on your body's response to HIV and the type of test you have: That's because it can take weeks until the signs of HIV in your body increase enough to show up on a test. They are all very accurate, but no test can find HIV in your body immediately after you're infected. You will need to have HIV tests during and after taking PEP. PEP may prevent an HIV infection if it is started within three days after a possible exposure. If you think you were exposed to HIV, talk with your health care provider right away about emergency treatment, called PEP (post-exposure prophylaxis). Getting tested for HIV helps catch the virus early so you can start treatment, stay healthy, and avoid spreading HIV. If you have HIV and you take HIV medicines as prescribed, you may never get AIDS. AIDS increases your risk of developing certain cancers, too. These are called opportunistic infections, and they can become life-threatening. With AIDS, your body has trouble fighting off infections from germs that usually don't cause problems in healthy people. Without treatment, HIV gradually destroys your immune system, which leads to AIDS. AIDS is the final, most serious stage of an HIV infection. HIV is the virus that causes AIDS (acquired immunodeficiency syndrome). This usually happens during sex or when sharing needles or other items used to inject drugs. HIV is spread through contact with blood and other body fluids from a person who has an HIV infection. If you lose too many immune cells, your body will have trouble fighting off infections and other diseases. These cells protect your body against diseases from germs, such as bacteria and viruses, and fungi. HIV is a virus that destroys certain cells in your immune system. An HIV test checks a sample of your blood to see whether you are infected with HIV (human immunodeficiency virus).
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