Contracting Hiv

Hello.

I find myself worrying very much when my hands are scratched (scratched meaning that when I pour alcohol over the scratched area, it stings!) and I have to shake hands with other people, who maybe are also scratched. I saw on different occassions this happening, and it is a very stressful situation for me. Can this corporal contact between scratched hands or scratched area on the body and another scratched person, or this person's saliva, lead to infection with aids, supposing the stranger is a bearer?


And also, very important for me. How long does the virus live once ejected from the bearer's body? I mean, an infected person bleeds on the streety, and I walk aover that stain, and then I walk in my house, then drop my jacket on the floor, then I touch the jacket again etc. Is it dangerous? How much does this virus live once ejected from the stream blood line?


Help me please.


Eliza