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I was injected with a dirty needle ( unbeknownst to me at the time) 8 weeks ago.I have developed some lesions on my tongue as well as mild thrush.Yet all my public health lab blood draw tests (13,22,28,35,40,44,56)days have come back non reactive. Is 90 days test conclusive? Why hasn’t hiv antibody been detected in your opinion? I was very healthy before this exposure. Thanks

Hi, and thanks for your question

Yes, the window period (the time between when a person comes in contact with a sexually transmitted infection and when the STI will show up on a test) for HIV using the 4th Generation HIV Antibody test is 3 months (90 days). This means that if you have a negative, or non-reactive, test more than 90 days after the exposure you do not have HIV.

The reason that HIV antibodies have not been detected in your case is presumably because you do not have HIV.

The symptoms you are describing are not specific to HIV and could be attributed to any number of different causes.  If you are concerned about the symptom, you could revisit your family doctor to discuss the symptoms themselves, knowing that your HIV test is negative.

Let us know if this does not answer your question or if you have any more questions or concerns.
Health Nurse

This answer was posted on October 7, 2019

Community comments

Anonymous says:

Hi, i had protected sex in Amesterdam with one red light women and she used condom immediately before touching my body and then we had vaginal intercourse for 4-5 minutes her top and i am bottom and i am confident Condom was not ripped and i don't know why i did this as i am married and father of son. It's been almost one year now and have tested for HIV Rapid from Lab two times once at 4 months and other at 8 months ..i am asthmatc patient and not very healthy over all but since then i am feeling acidity (gastritis) in my stomach...can inhaler (take once daily) delay the window period and i heard there are very few people who converted to HIV positive after 6 months ...should i move in life with wife ? Because w
n i go throu

Health Nurse says:


We don’t see HIV passing with the type of sex you have described. Condoms offer great protection against HIV. The inhaler you take would not delay the window period. With 3rd and 4th generation HIV tests we find that the window period for HIV is now 3 months. Given that you had a negative HIV test at 4 and 8 months it means that HIV was not passed to you when you had sex in Amsterdam.

I would recommend seeing a health care professional about your stomach. My guess would be that stress/worry could be causing some of the symptoms. It’s common for us to see this in the clinic when someone does something that is not typical for them, there can be a lot of worry afterwards. If you think this is happening to you have a look at our worry page.

Health Nurse

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