What you know about HIV Window Period and Test Accuracy?

“Today we are going to talk about the HIV Window Period and the Accuracy of HIV tests. This has understandably caused a lot of confusion.

The HIV Window Period is the time from when a person is infected with HIV to when our tests can tell us that he or she is infected with HIV.

This means if a person who is infected does a test during this so called window period, the test will tell us he is NOT infected with HIV even though he is. This is called a false negative test.

Logically, the window period depends on the type of HIV test done.

The PCR RNA HIV test is accurate from 10 days after infection.

The 4th Generation HIV test aka the combo test is accurate from 28 days after infection.

So what happens between day 1 and 10 you ask? This is called the eclipse period where no tests we have now are accurate.

To keep it simple, just remember this: If you are 10 days to a month from exposure, get the HIV RNA test. If you are 28 days or more from the date of exposure, get the HIV 4th generation test.” – Dr Tan


We are a fully certified Anonymous HIV testing and screening clinic in Singapore.

HIV Screening

HIV Prevention

High risk exposure to HIV in the last 72 hours

Condom Broke? HIV PEP or HIV Prevention / Post Exposure Prophylaxis (PEP) is the use of antiretroviral (ARV) medications to prevent or to stop the human immunodeficiency virus (HIV) from entering and infecting the body after exposure in the last 72 hours.

Long term prevention from HIV

HIV Pre-Exposure Prophylaxis (PrEP) is simply a tablet taken daily that reduces a person’s risk of contracting HIV.

Anonymous HIV Testing at Our Clinic

Dr. Tan and Partners is one of the few MOH approved Anonymous HIV Testing Centres in Singapore. Learn More

1.) Just walk into our clinic Robertson Walk.
2.) Let our staff you are here for the “3 step test”*.
3.) You will be given a pamphlet & AHT Registration Form
4.) The form does not require any personal details from you.

5.) The doctor will see you in his or her room.
6.) You will have a private consultation with the doctor.
7.) Doctor will proceeds with the “3 Step Test”*.

8.) After 20 minutes your results will be ready.
9.) Assessment on the results of your HIV test.

We have teamed up with the counselors from Oogachaga to provide free counselling while you wait.

This service will be available every Friday from 6pm to 9pm beginning 11th July 2014 at our Robertson Walk branch.

You may print the Anonymous HIV Testing form and pass it to our Staff  Print AHT Form

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