Guys The fact of the matter is that actually Viruses can/do survive outside their hosts and thats how they spread and thats the reason why they are so damn successful.Few points about HIV:
1.Its probably the weakest Virus known to us.This sucker can't even survive the gastric juices of mosquito and thats why it doesn't spread by mosquito bites.
2.Good news.People say avoid unprotected sex but actually the chances of contracting HIV from a one time intercourse is next to nothing,it spreads when you repeatedly have intercourse with an infected person.So of course we should avoid unprotected sex but wth we can loosen up a bit(just j\k).
3.Contracting HIV from an infected needle on a cinema hall seat where it was lying there for god knows how many days is again next to nothing but but it is possible so be careful.But guys who go to picture halls anyway,not me.But if they start putting these needles on DTC seats then I would be really scared.
4.Bacterial diseases can be treated but viral diseases can only be prevented.There is no cure for viral diseases.