1 People who have a severely impaired immune system may take longer to develop HIV antibodies. 2  People who have taken post-exposure prophylaxis (PEP). 3  This is a one-month course of anti-HIV drugs that, if started within 72 hours of potential exposure, may reduce the risk of HIV infection.
http://www.catie.ca/en/pif/fall-2010/detecting-hiv-earlier-advances-hiv-testing
Hepatitis C. If a person exposed to hepatitis C becomes infected, virus particles (called HCV RNA) can be detected within 1-2 weeks. Liver function tests also will tend to rise during this timeframe. Hepatitis C antibodies appear after RNA is detectable and can take 3-12 weeks to appear.
http://www.hepatitis.va.gov/patient/hcv/testing/time-required-to-test-positive.asp
However, a negative p24 test can mean three things: 1  the person is HIV-negative. 2  the person is HIV-positive but that the test could not detect the p24 protein because the person was infected more than four to six weeks earlier. 3  the levels of p24 antigen are too low to be detectable with current technologies.
http://www.catie.ca/en/pif/fall-2010/detecting-hiv-earlier-advances-hiv-testing
1. Please switch auto forms mode to off. 2. Hit enter to expand a main menu option (Health, Benefits, etc). 3. To enter and activate the submenu links, hit the down arrow. You will now be able to tab or arrow up or down through the submenu options to access/activate the submenu links.
http://www.hepatitis.va.gov/patient/hcv/testing/time-required-to-test-positive.asp
This article will take you on a tour of the different types of HIV tests available and will walk you through how long it takes for each test to tell you accurately if someone has HIV. Since the early days of the HIV epidemic, HIV tests have improved considerably.
http://www.catie.ca/en/pif/fall-2010/detecting-hiv-earlier-advances-hiv-testing
HIV SYMPTOMS. Symptoms of early HIV infection — Early symptoms of HIV infection develop in 50 to 90 percent of people who are infected, usually beginning two to four weeks after exposure to HIV. The initial group of signs and symptoms is referred to as primary or acute HIV infection.
http://www.uptodate.com/contents/symptoms-of-hiv-infection-beyond-the-basics
HIV is the virus that causes AIDS (acquired immunodeficiency syndrome). AIDS is the most advanced stage of HIV infection. HIV testing can detect HIV infection, but it can’t tell how long a person has been HIV infected or if the person has AIDS.
https://aidsinfo.nih.gov/education-materials/fact-sheets/19/47/hiv-testing
The time period from infection with HIV until the body produces enough HIV antibodies to be detected by an HIV antibody test is called the window period. Most people develop HIV antibodies within 3 months after they are infected with HIV. But the window period can vary depending on the HIV test used. In general, anyone who has a negative result on an HIV antibody test within 3 months of a possible exposure to HIV should have the test repeated in 3 months.
https://aidsinfo.nih.gov/education-materials/fact-sheets/19/47/hiv-testing
For more on rapid HIV testing, see A rapid approach to community-based HIV testing. Research shows us that with these new tests, as many as 95% of people who test positive will do so within 34 days of exposure to HIV.
http://www.catie.ca/en/pif/fall-2010/detecting-hiv-earlier-advances-hiv-testing
The p24 antigen test can detect the p24 protein on average 10 to 14 days after infection with HIV. , , , One drawback of this test is that levels of the p24 protein peak at around three to four weeks after exposure to HIV and are usually not detectable after five to six weeks (and sometimes even earlier).
http://www.catie.ca/en/pif/fall-2010/detecting-hiv-earlier-advances-hiv-testing
how long ago can exposure to hiv show up?
An exposure to HIV shows up 72 hours ago. It takes 72 hours for HIV to show up after exposure.