What is HIV window period in India?
What is the window period? Ans. The normal HIV blood tests detect the presence of antibodies in human body, which take about 6-12 weeks (upto 6 months in some cases) after infection to form in the body in detectable quantity. This period is called the window period.
How long is window period of HIV?
This page gives information on how soon HIV can be detected by a blood test and when you can be confident in the result. The window period of modern laboratory HIV tests is 45 days. The window period of rapid, point-of-care tests and self-tests is 90 days.
Is HIV window period 12 weeks or 3 months?
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.
Why is HIV window period 6 months?
There’s a window period between exposure to HIV and a positive test because it takes time for your body to either build a response to the infection or for the virus to replicate enough for a test to detect it.
When was HIV Recognised in India?
HIV infection in India was first detected in 1986 among female sex workers in Chennai. Today, with an estimated 5.134 million infections,2 India is home to the second largest population of people living with HIV and AIDS (PLHA).
What is the window period for 3rd generation HIV test?
An HIV antibody-only test (3rd generation laboratory test or POCT) may be done from about six weeks after exposure to HIV, but a negative result cannot be taken as definitive until 12 weeks (the window period).
Is 80 days HIV test conclusive?
The probability of a false-negative result is 0.01 at 80 days’ post-exposure for third-generation tests and at 42 days for fourth-generation tests.
What is the window period for an HIV test?
What is the window period for an HIV test? What is the window period? The window period is time between HIV infection and the point when a test will give an accurate result. Different types of tests have different window periods.
What is the window period for antibody tests?
Different types of tests have different window periods. 4th generation antibody/antigen (Ab/Ag) tests: 45 days. 3rd generation antibody only tests: 60 days. Point of care tests (self-sampling, self-testing and rapid tests: 90 days.
How long does it take for HIV to be detected?
During the window period a person can have HIV and be very infectious but still test HIV negative. UK guidelines recommend a window period of six weeks for a 4th generation antigen/antibody test. By this time 99% of infections will be detected (see Figure 7). Testing after only four weeks will detect 95% of infections.
What are the indicators of HIV epidemic in India?
The relevant, measurable and verifiable indicators will be identified and used appropriately. The HIV epidemic in India is concentrated among high risk groups (sex workers, men-having-sex-with-men, injecting drug users and clients of sex workers), though there is evidence of the infection spreading to the general population.