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What Is The Window Period For Hiv

How Often Do You Need To Get Tested For Hiv

What is the window period for HIV testing.

How often you should get tested depends on your personal practices, risk behaviours, and how often you engage in them.

For most people, it is important to have a full sexual health test at least once each year. This testing includes:

  • HIV

Even if you always use condoms, it is recommended you get tested annually as condoms dont provide 100% protection against HIV and STIs.

How Long Is The Window Period For Hiv

Answered by: Dr LM Nath | Consultant, Community Medicine,New Delhi

Q: I am 27 years old. I have been asking this question to everyone but not getting any answer. I went through all websites, which say that the window period is maximum 6 months, even you also said 6 months earlier but in your question and answers section, in a couple of questions, one expert says that this may take one year too. I tested after 6 months, which was negative but I am worrying a lot. Do I need to wait for one year?

A:Given your history please stop worrying. If you test negative EVEN ONCE at 6 months you were not infected at the contact you mention. As long as you do not believe the answer, you will keep on worrying. It is over. You made a mistake and you have paid for it in terms of worry and tension. I am sure you have learnt your lesson and will take care not to expose yourself to infection again. Relax, accept that you made a mistake and were lucky. You are OK.

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What Is The Window Period Of Hiv Antibody Tridot Test In India

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How Long Do You Have To Wait After Unprotected Sex To Take An Hiv Test

By | Oct. 14, 2010, 11:04 a.m.


how long does it take after u have unprotected sex for u to get tested for hiv? can u get tested right away and know the results? or do u have to wait a certain amount of time.

HIV tests detect antibodies the immune systems response to infection. For the majority of people, HIV testing will be accurate at four to six weeks after possible infection. However, for some people it may take longer up to three months for detectable antibodies to develop. This is called the window period. During the window period, HIV tests can come back negative even though the person has the virus. HIV can be passed to other people during the window period. To make an appointment for HIV testing, contact your local Planned Parenthood health center. Tests are also available from most health care providers, hospitals, and health centers. Local, state, and federal health departments may offer free testing. The Centers for Disease Control and Prevention lists HIV testing locations and offers information about home testing. The site can also be accessed in Spanish.

Tags: HIV/AIDS, HIV testing, STD testing

Planned Parenthood delivers vital reproductive health care, sex education, and information to millions of people worldwide. Planned Parenthood Federation of America, Inc. is a registered 501 nonprofit under EIN 13-1644147. Donations are tax-deductible to the fullest extent allowable under the law.

Estimating Incidence From Prevalence


Incidence is difficult to study directly, as it requires the recruitment and follow-up of a large cohort and expensive serologic testing at multiple time points. Our analysis was restricted to individuals falling into very specific behavioral categories, which further narrows the pool of available studies. For the HRD category of CSWs, we did not find a sufficient number of incidence studies to derive pooled estimates for these populations. However, we did find a number of HIV prevalence studies in individuals falling into this category. We used methods previously described by Zou et al. for estimating the incidence of a disease from the prevalence by comparing to a population where both incidence and prevalence are known, with studies of incidence and prevalence in IDUs as the comparison group to estimate incidence in CSWs .

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When Should You Get Tested For Hiv After Condomless Sex

Theres a window period between the time a person is first exposed to HIV and when it will show up on different types of HIV tests.

During this window period, a person may test HIV-negative even though theyve contracted HIV. The window period can last anywhere from ten days to three months, depending on your body and the type of test that youre taking.

A person can still transmit HIV to others during this period. In fact, transmission may even be more likely because there are higher levels of the virus in a persons body during the window period.

Here is a quick breakdown of different types of HIV tests and the window period for each.

What Is The Hiv Window Period

It takes time after the human immunodeficiency virus enters your body before a test can detect it, and this period of time is known as the HIV window period. If you take a test during your window period, the HIV test may show up as negative even if you have been infected with HIV. You can still pass the virus on to someone else during this time. It’s important to consider this window so you can get accurate test results and take precautions to protect yourself and others.

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What Do Test Results Mean

Getting Tested

To understand what your test results mean, you first have to understand what kind of test is being used and what a “window period” is.

Most HIV screening tests look for HIV antigen or for HIV antibodies , or may look for both. Newer testing strategies use a combination antigen/antibody test. Some testing sites also use a test that looks for genetic material of the HIV virus.

The window period is the period between the time someone is first infected with the HIV virus and the time an HIV test can detect HIV infection. After someone has been infected with the virus it can take about 2 weeks for HIV antigen to be detectable with current antigen tests, and more than 3 weeks to produce enough HIV antibodies to be detected by antibody tests. In a very small number of people, the process takes up to several months.

During the window period, someone might be infected with HIV yet still have a negative result on an HIV test. Here’s how that can happen. Let’s say you have condomless sex on Saturday night and become infected with HIV. On Monday, you get an HIV test. The test almost certainly will come back negative, because there is not yet enough HIV antigen or HIV antibody for the tests to detect.

Newer methods of HIV testing are narrowing the time of the “window period” and reducing the chance of a falsely negative result.

When testing is completed, your provider will tell you the result. Possible results are:

Hiv Tests Used In British Columbia

What Is the “HIV Window Period”?

Antibody tests

These tests measure antibodies to HIV. Antibodies are proteins made by the immune system when the body is exposed to an infection. It takes time for the body to make antibodies after it is exposed to HIV, and different people make antibodies at different rates.

The window period for antibody tests is between 3 weeks and 3 months. Up to 95% of people will have antibodies after 6 weeks, and 99% of people will have antibodies after 3 months.

The point-of-care HIV test is an antibody tests offered in some locations in BC. The HIV Confirmatory Assay is an antibody test used to confirm a preliminary positive HIV result.

Antigen tests

The 4th generation Enzyme Immunoassay Test test is a combined antigen / antibody test. The antigen, or viral protein, used to detect HIV is called p24 antigen. This p24 antigen shows up in the blood soon after a person gets HIV.

The 4th generation EIA test is the standard HIV laboratory screening test used in BC. Ninety-nine percent of these tests will be positive 6 weeks after a person gets HIV.


This test looks for the genetic material of HIV in the blood. It is also known as the “early HIV test” or “RNA test”. Ninety percent of NAATs are positive 10 to 12 days after a person gets HIV, and over 99% are positive after 6 weeks.

The RNA NAAT can be specially ordered by doctors or nurses if someone has had a recent high-risk exposure to HIV and/or they are having symptoms that are highly indicative of HIV.

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When Should I Have An Hiv Test

Testing is highly recommended for anyone who feels like they have been exposed to the virus or is at high risk of being infected. High-risk activities include non-monogamous sex, unprotected sex, and injectable drug use.

If you know the moment you may have come into contact with HIV, get a test three months later after that date. Getting tested three months after exposure gives a 99% accurate test result.

Testing for HIV is available at a hospital, clinic, pharmacy, community clinic, family planning clinic, youth center, mobile sites, or with a take-home test. To find a testing site near you, use the online locator offered by the U.S. Department of Health and Human Services. Many of the sites offer walk-in testing. Some require an appointment.

Get Tested Every Three Months

Whats the best time to get tested for HIV and STIs? We recommend people who are sexually active and people who inject drugs get tested for HIV and sexually-transmitted infections every three to six months.

Establishing a regular testing schedule for yourself is a great way to take charge of your sexual health. Encouraging your regular sex partners to do the same is a great way of helping your partners and the community.

If you live in San Francisco or the Bay Area, stop by any of our locations for free HIV and STI testing. A counselor will be able to recommend a testing schedule for you. Schedule tests far in advance so they become routine.

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Which Test Can Give Me Results The Soonest

The period of time also differs, depending on which kind of test you take. The different types of tests include:

  • Antibody tests, which look for the antibodies — special proteins that help fight infection — that your body makes in reaction to an HIV infection. Most rapid tests and at-home tests are these kind. Antibody tests require the longest wait time after infection to get an accurate result. For most people — around 97% — this takes anywhere from 2 to 12 weeks. For some, it can take as long as 6 months.
  • Combination or fourth-generation tests, which look for both antibodies and antigens. Antigens are part of the virus itself. One antigen, p24, is detectable before your body starts making antibodies. These tests are becoming more common in the U.S. They can tell you if you have HIV a little sooner than an antibody test can.
  • Nucleic acid tests , which can detect HIV in your body the soonest after infection. The test looks for the virus in your blood. You need a certain amount of the virus in your blood before the test will detect it. This is called your viral load. You can get a negative test if your viral load is still low. A NAT can tell you if you have HIV as early as 7 to 28 days after infection. It gives the quickest result, but itâs also the most expensive. Doctors donât typically use it unless youâre at a high risk of exposure to HIV.

Youâre more likely to have a NAT if you:

Dried Blood Spot Test

Window Period &  Other Information  Action for AIDS Singapore

A DBS test is a free, accurate and convenient way to test for HIV in the comfort and privacy of your home.

It involves collecting a few drops of blood from your finger and allowing the blood to dry on a test card. You then send the card away to get tested and wait around a week to get the result back. You can register for a DBS HIV test here.

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Hiv And The Window Period

HIV is renowned for being a complex virus that is difficult to eliminate from the body. But thanks to a global research community, we now know so much more about how the virus works, including how we can use testing to detect it.

Today, we have many different tests available to screen for HIV, which is great! Regular check-ups keep us all safe and healthy, so its good to know a thing or two about it. One of the things that you may have heard little about, yet is an important part of the science behind testing is known as the window period.

How Are Testing Technologies Used To Diagnose Hiv Infection

To test for HIV, a sample of a persons blood is taken. With the most common test, a vial of blood taken from a vein is sent to a laboratory to be tested for HIV . There are also rapid tests available, which use a drop of blood from a finger prick to test for HIV immediately after the sample is taken.

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Men Who Have Sex With Men

Seven studies of HIV incidence among MSMs represented a total pooled sample of 19,567 participants and 53037.2 person-years of follow up . Incidence rates ranged from 0.97.1 per 100 person-years, with a pooled rate of 1.7 . There was significant heterogeneity in estimates likely due to differences in inclusion criteria and recruitment strategy. The studies with convenience sampling of men seeking HIV or other STD testing reported higher incidences , whereas those with community-based recruitment reported lower incidences . Per 10,000 donors, the risk of HIV WP infection was 10.2 for ELISA and 4.2 for NAT .

Hiv Testing And Your Rights

window period for hiv test (when to test for hiv)

Testing for HIV is voluntary and can only be done with your informed consent, except in exceptional circumstances.

Before you are tested, you will be provided with information about what is involved. what the results might mean for you, and how to prevent HIV transmission in the future. All people who request an HIV test must receive this information from the test provider.

Under Australian and Victorian law, it is unlawful to discriminate against anyone who has HIV. Test results, and details on whether someone has been tested are strictly confidential. It is illegal for any information about a person being tested or a person with HIV to be disclosed without their permission.

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How Much Do Hiv Tests Cost

Unlike rapid tests, blood tests for HIV are covered by Medicare, which means your doctor can order the test free of charge for you.

If you are not eligible for Medicare, you may also be able to claim some of the testing costs through private health insurance. Check with your provider to see if youre eligible.

What Does The Hiv Test Involve

The Centers for Disease Control and Prevention recommend that all people between the ages of 13 and 64 be tested at least once for HIV. People with known risk factors should be tested yearly, or more frequently.

HIV tests are very accurate, but no test can detect the virus immediately after transmission. How soon a test can detect HIV depends on what the test is looking forantibodies, antigens, or the virus itself.

HIV testing uses a blood draw, a finger stick, or an oral swab. The type of sample used depends on the test.

These three types of diagnostic tests are used to detect HIV:

Antibody and antigen/antibody tests are typically used first because they are less expensive and easier to administer. They may also detect signs of HIV sooner. A NAT test may be used to confirm a positive result on an antibody or antigen/antibody test, or if these tests are negative and there is a strong suspicion for new HIV infection.

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Letting Partners Know You Have Hiv

If you have just been diagnosed with HIV, it will likely be a difficult time. You might still be struggling to come to terms with diagnosis.

During this time, it is important to let any sexual or injecting partners know they may have been exposed to HIV as soon as you can, so they can be tested and offered PEP if appropriate.

You do not have to do this alone. Your doctor or the Department of Health and Human Services Partner Notification Officers can help you through this process and ensure your identity is not revealed.. Both groups can provide information, support, and guidance for people living with HIV.

Hiv Incidence And Risk Of Wp Infection Among Incarcerated Persons

HIV Update For General Practioners 2013

Three HIV incidence studies among incarcerated individuals were identified with a pooled total of 5168 participants and 2891.5 person-years of follow-up. Incidence estimates ranged from 0 to 0.5 per 100 person-years, and the pooled incidence was 0.4 per 100 person-years . Per 10,000 donors, the risk of WP HIV infection was 2.3 when HIV ELISA was used and 0.9 when NAT was used .

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