Yes, it is possible.
As soon as they test positive for the HIV virus.
HIV positive
You can't get infected with HIV from someone coughing on you.
It is possible to have a false negative HIV test, particuarly early in infection with HIV. If a partner has a true negative HIV test, it's not possible to get HIV from them.
Not unless they're (a) HIV positive AND (b) you have unprotected sex !
No. It's less risky than sharing a needle with someone HIV positive, but it's not "safe".
It is better to be HIV negative than HIV positive. An HIV positive person is infected with HIV.
Yes, but they can give the HIV onto someone else, and they could get AIDs too.
no... he is not hiv positive..
Highly unlikely as no harm has been done.
All HIV Positive people are required by law to disclose their HIV status to people before they have sex with them. It is against the law to sleep with someone without disclosing your status to them first.
Yes they can.