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Doctor insights on: Window Period For Hiv Test

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What is the window period for p42 antigen/ antibody dual 4th gen HIV test? And the window period for HIV RNA PCR test? When can it be conclusive?

What is the window period for p42 antigen/ antibody dual 4th gen HIV test? And the window period for HIV RNA PCR test? When can it be conclusive?

See below: Please consult this site for a detailed answer. Nucleic acid tests are conclusive about a month after acquiring infection. http://www.sfaf.org/hiv-info/testing/hiv-test-window-periods.html ...Read more

Dr. Lois Freisleben-Cook
16 doctors shared insights

Hiv (Definition)

Hiv infection is caused by a retrovirus....This retrovirus binds to CD4 cells (for the most part). You may detect the virus by several different methods. An elisa test (enzyme linked immunosorbent assay). You may also detect it by doing a test referred to as a western blot (a gel protein electrophoresis). Thirdly by pcr (polymerase chain reaction) which ...Read more


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My ELISA HIV test came up negative after 1month exposure. How accurate is this test?

My ELISA HIV test came up negative after 1month exposure. How accurate is this test?

90%: There's a period of time after a person is infected during which they won't test positive. This is called the “hiv window period.” The window period can be from 9 days to 3-6 months, depending on the person's body and on the HIV-test that's used. ...Read more

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According to WHO, 6 weeks HIV test is conclusive (unless I miss understood it) then why CDC recommends 3 to 6 months for conclusive results?

According to WHO, 6 weeks HIV test is conclusive (unless I miss understood it) then why CDC recommends 3 to 6 months for conclusive results?

The "Window Period": Window period is the time it takes lymphocytes to develop antibodies to an antigen. This is usually 4-6 weeks but can be as long as 3 months. By 3 months after exposure...97% of people will have antibodies to antigen. In rarer instances it may take up to 6 months to develop antibodies. After 6 months..99% of people exposed will have antibodies to viral antigens. Therefore the 3 to 6 months!!! ...Read more

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I did 4th Generation HIV test after around 4,5,6,7,8,9,10,11,12,14,15 weeks of an exposure. Is this 100% conclusive? can i get back safely to my wife

Sero-conversion: The whole concept of delayed sero-conversion dates back to old & sloppy tests. PCR testing now will show virus in the blood with or without antibodies. If you need to cling to the old adages...at 6 months..99.99% of the population will have developed antibodies after an exposure..thus the 6 month window. I believe a colleague of mine Lyssette Cardona, MD is in Dubai..she's one of the best!! ...Read more

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Help me.How long window period for HIV test of fourth generation ECLIA cobas 6000(combo) for HIV p24antigen & HIV antibody1 & 2 after exposure?

HIV testing: These antibody tests can take twelve weeks or more to be valid. If you are worried about an exposure the HIV rnaa test can b valid at 21days dater exposure. Please know that HIV infection can be prevented with post exposure prophylaxis...You just sve to act within 72 hours post exposure for it to work. ...Read more

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What is the window period of HIV test?

Time to turn positiv: After you get infected w/hiv (not every exposure leads to infection), there is a period of time where your tests will remain negative, depending upon you & your test. Therefore, you can also get HIV from someone who tested negative! assuming they tested during their window period. Check out http://www.Sfaf.Org/hiv-info/testing/hiv-test-window-periods.Html for more info. Practice safer sex! ...Read more

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What is the window period for p42 antigen/ antibody dual 4th gen HIV test? And the window period for HIV RNA PCR test? When can it be conclusive?

See below: Please consult this site for a detailed answer. Nucleic acid tests are conclusive about a month after acquiring infection. http://www.sfaf.org/hiv-info/testing/hiv-test-window-periods.html ...Read more

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Doc is it a must that one has to wait till is 3 months which is HIV window period before going for HIV test,to know his or her status?

Doc is it a must that one has to wait till is 3 months which is HIV window period before going for HIV test,to know his or her status?

No: You may test sooner, if the result is positive, it is definitive. If the result is negative, get a HIV nucleic acid test at 6 months after exposure to be sure. ...Read more

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What is the window period of HIV antibody tridot test in india?

What is the window period of HIV antibody  tridot test in india?

HIV antibody Testing: You should have a valid answer by twelve weeks on this test. It is not the best test in an acute exposure. Your question also implies that you do not know that HIV infection can be prevented after a high risk exposure as long as the appropriate action is taken within 72 hours of exposure. This process known as post exposure prophylaxis is very effective at preventing infection. ...Read more

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Dr. Lisa Oldson
348 doctors shared insights

Hiv Test (Definition)

There are several ways to detect the HIV virus. The first is by antibodies. This includes eia (enzyme immuno assay). The rapid HIV tests are these types. The second way detects proteins on the viral coat (western blot). This is a gel plate electrophoresis. Thirdly there is pcr (polymerase chain reaction). This detects and amplifies dna allowing a viral ...Read more


Dr. Ed Friedlander
1,422 doctors shared insights

Human Immunodeficiency Virus (Definition)

Human immunodeficiency virus (HIV) is a lentivirus (a member of the retrovirus family) that causes acquired immunodeficiency syndrome (aids), [1][2] a condition in humans in which progressive failure of the immune system allows life-threatening opportunistic infections ...Read more