how are you? i have been having really tough last few weeks. i recently did a hiv 4th generation duo test. the results were non reactive after 5 weeks mark.
but i couldnt recall if the lab attendent opened a new syringe for me because i was so worried about the test.
i m very sure he used a new syringe to draw blood out of from my vain..
but for my anixety and curiosity can you please answer the following.
1. lets just suppose an old syringe was used to draw blood out, what are risks of getting hiv?
2. if the virus dies ver soon as soon as it is exposed to into the air then whay sharing needles or syringes are consider a risk..
3. also the risk of getting hiv is consider when someone inject something inside the body.
4. how much is the risk when drawing the blood out..
5. also if an infected syringe was reused then the test results might be reactive instead of non reactive because if there was some infected blood in the syringe it would have been detected.
6. also how much blood is required to get infected. can only few tiny drops infect someone,
also 3 days later i did an other 4th generation duo test and i made sure the syringe was open in front of me and i made him drew the blood form the same vain it was drawn last time...the resutls were non reactive
please if there are more information regarding this you can share i ll appreciate
i am sorry but i have to ask.
thank you
Hi there,

Thanks for reaching out to AIDS Vancouver, I'm happy to address your concerns.

1. The chance of an old syringe being used for testing is highly unlikely. It would go against proper protocol in handling testing equipment and the health of the patient. Regular protocol for testing is using a one-time-use disposable needle.

2. When we talk about sharing needles and HIV, we're talking about sharing needles for the purpose of drug use. In needles for drug use, there is a syringe and a barrel. When someone who is HIV positive uses a needle for drug use, they may accidentally draw some of their blood into the barrel, where it remains unexposed to oxygen. If that same needle is then used by another person, they risk injecting some of that HIV positive blood into their body. Since the needle is injected directly into the vein, this is a direct access to the bloodstream, and that is when HIV transmission can occur.

3. Injecting with shared needles (for the purpose of drug use) is considered to be a "high risk" activity, which means that studies have repeatedly associated sharing needles with HIV transmission.

In regards to your remaining questions, I encourage you to speak with the lab attendant who provided you with the testing, and make sure that a clean needle was used. Your concerns are focused around their protocols and what measures they took (or didn't take) in order to protect your health. It is your right to know their procedure for testing; it is your right to know that your case was handled with care and diligence. However, it is important to know that it would be very unusual to find out that a doctor tested you with a needle that has been used to test someone else

Please check out a reliable website which we refer people to often: If you have any more questions or concerns, please do not hesitate to ask. For more information, please visit our website at

All the best,


AIDS Vancouver Helpline

Phone: 604-253-0566 ext 299

Monday to Friday 10am – 4pm (PsT)

*Anonymous and Confidential*


Charitable Registration #
10668 9896 RR0001

© 2019
Privacy Policy


1101 Seymour Street
Suite 235, 2nd Floor
Vancouver, BC V6B 0R1


Main Phone: 604-893-2201
Fax: 604-893-2205