Aa
Curious
What does DUO stand for and do we have that test in US? Also --- is that result only good at about 28 days or is it conclusive 28 days and beyond? Curious. Thanks!!!!
I am just asking about tests and timing... Regarding my no risk incident i trying to manage that as best as i can...
Move on, you were given a time out in another forum for asking the same non risk issues.
Ok só if you have a undetectable pcr rna quantitative test at 8 days + negative antibody/antigen at 3 and 4 weeks all mean nothing? You would really need to go for a test at the 3 months mark? This came in the oposite way from what some doctors say....
There are no tests marketed or so that will give a conclusive negative test result earlier than three months post exposure.
The most common test for HIV is an antibody test. This tests for a persons immune response to having come into contact with HIV. An antibody is a protein produced by your body when it recognises an infection.
HIV antibody tests do not work as soon as you are infected. This is because it usually takes several weeks to generate antibodies to HIV. This is called the ‘window period’. Most people generate this response within 4–6 weeks, but approximately 5% of people take up to 3 months. The result of an antibody tests therefore only tells your your HIV status three months prior to the test. This is why people are advised to re-test three months after the exposure if you test at 4-6 weeks, or to wait three months before taking an HIV test.
Taking an antibody test less than 4 weeks after exposure will not tell you very much. You need to wait until at least 4–6 weeks after the exposure.
Some HIV tests combine an antibody (Ab) test with an antigen (Ag) test.
An antigen is a name for genetic material caused by a virus or other infection. In these tests the antigen being tested is p24 (protein 24), a major protein that is part of HIV.
p24 is detected 2–3 weeks after infection – before antibodies are produced, but not really afterwards – and p24 levels only stay high for the next 1–2 months.
p24 antigen tests can be used 3–4 weeks after exposure – so can give an earlier result than an antibody test. They are combined with antigen tests because the window period that p24 is detected is very short.
As with antibody tests, a small percentage of people may have a delayed response to HIV so people using this test four weeks after any potential exposure are routinely recommended to confirm a negative result three months later.
It is for these reasons that a DUO taken at 28 days or more after the exposure is extremely accuratate because there is an overlap with production of antigen and antibody so if the test (if taken 28 days onwards) WILL pick up one of them.
HIV antibody tests do not work as soon as you are infected. This is because it usually takes several weeks to generate antibodies to HIV. This is called the ‘window period’. Most people generate this response within 4–6 weeks, but approximately 5% of people take up to 3 months. The result of an antibody tests therefore only tells your your HIV status three months prior to the test. This is why people are advised to re-test three months after the exposure if you test at 4-6 weeks, or to wait three months before taking an HIV test.
Taking an antibody test less than 4 weeks after exposure will not tell you very much. You need to wait until at least 4–6 weeks after the exposure.
Some HIV tests combine an antibody (Ab) test with an antigen (Ag) test.
An antigen is a name for genetic material caused by a virus or other infection. In these tests the antigen being tested is p24 (protein 24), a major protein that is part of HIV.
p24 is detected 2–3 weeks after infection – before antibodies are produced, but not really afterwards – and p24 levels only stay high for the next 1–2 months.
p24 antigen tests can be used 3–4 weeks after exposure – so can give an earlier result than an antibody test. They are combined with antigen tests because the window period that p24 is detected is very short.
As with antibody tests, a small percentage of people may have a delayed response to HIV so people using this test four weeks after any potential exposure are routinely recommended to confirm a negative result three months later.
It is for these reasons that a DUO taken at 28 days or more after the exposure is extremely accuratate because there is an overlap with production of antigen and antibody so if the test (if taken 28 days onwards) WILL pick up one of them.
Freedomhealth say it is.The antibody part of the test should be accurate by then.
The DUO is a combination of an antibody/antigen test and is considered Highly effective at 28 days+ because this is when p24 antigen is at it's peak.
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