Get your Health question answered in 3 easy steps
A Doctor will be with you shortly
Ask a Doctor Now
136 Doctors are Online

What are the chances of getting HIV with a third generation negative HIV test?

User rating for this question
Very Good
Answered by

General & Family Physician
Practicing since : 2005
Answered : 2305 Questions
Would my chances be 95% if i Tested negative at 27 days usin a 3rd generation hiv test; eventhough, I'm 1 day shy Frm 4 weeks??
Posted Mon, 10 Feb 2014 in HIV and AIDS
Answered by Dr. Prasad 29 minutes later
Brief Answer: Yes.. Detailed Answer: Hi, The current HIV antibody detection tests (3rd generation HIV tests) available in the market are highly sensitive and is able to pick up antibodies within 3-4 weeks. Therefore negative report on 27 days is almost 99% confirmatory of HIV negative state. So I wouldn't be bothered. Hope this helps you. Let me know if you need clarifications. Regards
Above answer was peer-reviewed by
Follow-up: What are the chances of getting HIV with a third generation negative HIV test? 6 hours later
Thanks... My only concern is, why do most people say a person has to wait 6- 12 weeks using a 3rd generation hiv test.. In your medical opinion, what's the EARLIEST (in days) can a person get tested using a 3rd generation test NOT a 4 generation and get a good accuracy?? Also when (in days) will a person body start producing antibodies if they were infected?? Thanks
Answered by Dr. Prasad 2 hours later
Brief Answer: Current 3rd generation HIV test is superior than.. Detailed Answer: Hi, HIV antibody production has a window period where the test fail to detect them. This window period roughly correspondence to 2 - 4 months after exposure. Further the previous 3rd generation antibody test were not as sensitive as the current one. So we weren't very sure of the test was accurate during the early days. In view of suspected inaccuracy, doctors recommended a repeat test after the window period. But the time are changed now. Modern 3rd generation antibody test are proved to be accurate even during early days. In fact the accuracy is close to 100% even before 4 weeks. Therefore I don't doubt the results of your test. As far as your second question is concerned, antibodies are produced within few days after infection. Currently available tests are able to convincingly detect it's presence by 2-3 weeks. However the production falls between 2-4 months to rise again. It stays elevated until the body immune cell starts failing from the virus load. Hope I have answered all your questions. Write back for clarification. Regards
Above answer was peer-reviewed by
Share on Facebook
Share on Twitter
Share on Google+
Question is related to
Diseases and Conditions
Lab Tests
Medical Topics

The user accepted the expert's answer

Ask an HIV AIDS Specialist

© Ebix, Inc. All Rights Reserved.
All the information, content and live chat provided on the site is intended to be for informational purposes only, and not a substitute for professional or medical advice. You should always speak with your doctor before you follow anything that you read on this website. Any health question asked on this site will be visible to the people who browse this site. Hence, the user assumes the responsibility not to divulge any personally identifiable information in the question. Use of this site is subject to our Terms & Conditions
Already Rated.
Your rating:

Ask a Doctor