I'm planning to donate blood and want to make sure everything is okay. I've never had sex, but there was this one time I accidentally used a syringe that had already been used, and it's been bothering me ever since. I'm thinking about getting an HIV test, but I'm a bit confused with all the types, like HIV 1 and HIV 2. Which one should I go for just to make sure I'm all clear? Is it safe to take this test? I'm feeling a bit anxious and could use some guidance.

Answered by 1 Apollo Doctors

Dr Chandra P

General Practitioner

MBBS
5+ Yrs

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To check your HIV status, you should undergo a 4th or 5th generation HIV combo test, also known as a HIV DUO or HIV TRIO test, which detects both HIV-1 and HIV-2 antibodies and p24 antigens, providing accurate results from 18-24 days post-exposure; this test is safe, confidential, and usually free at government-approved testing centers or hospitals.

Dr. Chandra Suggests...

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Answered 04/07/2025

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I'm trying to understand the difference between the Dengue IgG and IgM tests and the dengue NS1 test. When should one be used over the other? Are they looking for different things, and does it matter how soon after symptoms show up that you take them?

The NS1 test detects the dengue virus NS1 antigen, while the IgM from 3-5days and IgG after 7 days to detect the dengue virus antibodies.

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I'm really worried after visiting a barber shop because I'm afraid I might have been exposed to infections like HBV, HCV, or HIV. Could you tell me more about when I should get tested? I heard that an antibodies test for HIV can be done after 4 weeks or even up to 12 weeks, but I also read something about a p24 antigen test that can be taken after 4 weeks. How accurate are these tests? I could really use some advice right now.

Antibodies test for HIV can be performed after 4 weeks for preliminary results, but for more accurate results, it is recommended to wait for 12 weeks post-exposure. The p24 antigen test can be performed after 4 weeks to detect the HIV virus directly. It is important to follow up with healthcare provider for further evaluation and management.

Answered by 1 Apollo Doctors

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Disclaimer: Answers on Apollo 247 are not intended to replace your doctor advice. Always seek help of a professional doctor in case of an medical emergency or ailment.