How Long After Exposure Does It Take Hiv To Show Up In Blood Test

Here's a taste of what has to offer on this topic:
Get the Facts
AIDS InfoNet

How Risky Is It?

...risky behavior and that you were not exposed to any HIV-infected fluids. The only way to know for sure whether you have been infected is to get tested. You should wait for 3 months after a possible exposure. Then get an HIVblood test (see Fact Sheet 102 ). You might feel that you have been exposed toHIV by sharing needles, an accident, or unsafe sexual activity. In these cases, talk to your health care provider immediately . Ask whether...
Ask the Experts


I had an incident where I could have possibly been exposed to HIV. I say that because I do not know that persons sexual history. The condom came off while having sex, but I do not know how long we were exposed before I noticed it. This happened 12...
Robert J. Frascino, M.D.

Response from Robert J. Frascino, M.D.

The Robert James Frascino AIDS Foundation
...Hello,Your negative EIA at 12 months is definitive and conclusive. There is not need for additional HIV testing. HIV is not your problem. No way, no how.Dr. Bob Read more »

Does it matter when I was exposed?

Hi Doc D.,I very strongly believe I have had HIV for about 4 months. I coincidentally went in for a blood test about 8 weeks after I believed I was exposed and it came back positive. I know my initial CD4 was 266. That would have been about 9 weeks...
Eric Daar, M.D.

Response from Eric Daar, M.D.

UCLA School of Medicine
It is always difficult to know when one becomes infected but certainly getting diagnosed early is good for many reasons. Whether treating within the first weeks to months of infection is better than the first years after infection is still an... Read more »

when to get tested for hiv

Doctor, I may have been exposed to hiv roughly 4 months ago. Is it too early to be tested, and how long should I wait for an accurate test result after possible exposure?
Judith Feinberg, M.D.

Response from Judith Feinberg, M.D.

University of Cincinnati, College of Medicine
...Four months is not too early, it's a good time to be tested. Almost everyone who is HIV-infected will have a positive blood test by 4 months. Read more »

Dangers of Sun Exposure

Are there particular dangers from sun exposure for HIV+ people? I am not on any antiretrovial meds or antibiotics, but I was wondering if sun exposure would affect immune function. Frankly, I'm extremely fair and wouldn't mind being able to tan a...
Keith Henry, M.D.

Response from Keith Henry, M.D.

University of Minnesota, School of Medicine
...significant fraction of patients. I have not observed that sun exposure has any clinically significant effect on HIV status (such as blood test results) .KH Read more »
AIDS InfoNet

Acute HIV Infection

...Risk of Infecting Others The number of HIV particles in the blood is much higher during acute HIV infection than later on. Exposure to the blood of someone in the acute phase of infection is more likely to result in infection than exposure to... Read more »
AIDS InfoNet

HIV Health Checklist

...measures red blood cells, white blood cells and platelets (cells that help clot your blood if you get a cut. It is the most common blood test. Test at baseline and every 3-6 months. Chemistry Panel (See fact sheet 122 ): This combination of... Read more »
AIDS InfoNet

Treatment After Exposure to HIV

...disease prevention. Post-exposure prophylaxis (or PEP) means taking antiretroviral medications (ARVs) as soon as possible after exposure toHIV, so that the exposure will not result in HIV infection. These medications are only available with a... Read more »
San Francisco AIDS Foundation

The Stages of HIV Disease

...however, a faster decline of the immune system occurs at some point, and the virus rapidly replicates. This damage can be seen in blood tests before any actual symptoms are experienced. HIV positive people should seek medical care and begin... Read more »