As I am sure you understand -- intellectually if not emotionally -- this is your cypridophobia speaking, nothing more. You needn't be worried at all. I agree with the emergency care advice you had -- this was a zero risk event for HIV and all other blood borne infections. In the entire 40 year history of the world-wide HIV/AIDS epidemic, not one person has been documented to have been infected by puncture or other wound by a sharp object in their environment. The only such infections have occurred in health care providers while providing care to HIV infected persons, and in those instances the offending injury involved a visibly bloody sharp instrument. And even these kinds of instances have been very rare, under 100 cases world-wide in those 40 years.

In this particular instance, there is no realistic possibility the sharp object was contaminated with blood; even less chance that any blood present was from an HIV infected person; HIV dies when blood dries, with no possibility of infecting anyone; and finally, there is no risk when an injury isn't deep enough to see obvious bleeding.

Those comments pretty well cover your specific questions, but to assure no misunderstanding:

2. Do you think this is a no risk event for HIV? Same question with opposite wording:  yes, this was a no risk event.

3. Do you think I should get the PEP treatment for HIV based on this contact? No.

4. What if my skin damaged a little bit even though it was not bleeding? Can I get HIV? Still no risk.

5. Should I be tested on this event ,I am worried about false positives? There is no need for testing. False positive HIV test results are extremely rare, however -- never a valid reason to avoid testing. Still, don't do it: there is no need.

I hope these comments are helpful. Let me know if anything isn't clear.

HHH, MD