The reasons why many official (e.g., governement) educational messages tend to exaggerate the risks of HIV are complicated, and have been discussed previouly on this forum. The most important reason is that the people designing such message prefer to err on the side of conservative caution; if there is any risk, no matter how small and how theoretical, it gets listed, often without any indication of the different levels of risk from one setting to another. HIV is hard to transmit; it takes lots of virus, not just a small exposure.
Please re-read my response above. I stand by my reply. If the sort of contact you describe could transmit HIV, AIDS would be 100 times more common than it is and it would not be classified as a sexually transmitted infection. Truly, you are not at risk.
It is probable that nobody in the world ever caught HIV from being shaved, even if the barber was HIV infection. You aren't going to be the first. It is true that sometimes herpes zoster (shingles) can be a sign of immune deficiency, and it is also true that it is most common in older people. However, it is not rare in immunologically normal younger persons; my own son had shingles at age 14. The vast majority of shingles cases occur in people with normal immune systems. Finally, HIV blood tests are almost always positive within 60 days, so your negative test result proves you weren't infected.
To your specific questions:
1) The duration of HIV survival outside the body doesn't matter. The time can vary from seconds to hours, depending on whether the secretions have time to dry out, air temperature, and things like that. But regardless of HIV survial, such exposures never transmit HIV.
2) Zero risk.
3) The differences between test "generation" are in frequency of positive results within 3-4 weeks. After about 1 month, all "generation" tests are pretty much the same. Your negative result at 2 months is very reliable.
4) See my comments above about shingles.
You did not catch HIV. If you don't share drug injection equipment with other people or have sex with infected persons, you never will catch it. The sort of contact you describe, as well as other day-to-day contact with other persons, simply are not risk for HIV.
I hope this helps calm your nerves. You have no worries. Your English is fine, by the way.
Regards-- HHH, MD
You came to the forum for reassurance. Stop arguing, accept the reassuarnce, and move on. That's the end of this thread. If there are any further comments, I will delete the entire thread without further reply.
Does it right that I understand?
"HIV is hard to transmit because it needs lots of virus and so blood"Can't transmit with small exposure"
So if someone is hiv + and cut himself with a razor and the other after him 2-3 minutes cuts himself with the same razor , (without soap or water etc.) there can't be a hiv transmission.Because hiv can't transmite with small exposures. Right?
Thank You Mr.Handsfield for your replies.Especially in all web pages in turkey and other countries they always writes "you can catch hiv with contamined razor or piercing etc." and as you said we can't...why they always say that and frighten people? and also one thing ı can't understand is "there are two cuts and also blood, and how can't it transmite?" what does hiv need to transmit?