can someone tell me how virses spread? not computer viruses but health ones. For example like aids or hiv. I know it can come from blood or sex. But can u give me information on how vuruses like these can spread around the world? a site would be helpfull. Thank you!

Picture this:

Bob has the HIV virus, and he has unprotected sex with Mary, who is a stewardess. Mary goes home to Australia, and has sex with her boyfriend Joe, who is now infected. Joe goes Backpacking in Switzerland, and has sex with Tina, who he meets in a hostel, and who is now infected. Tina goes home to Her Swiss commune, where she shares a needle with 8 friends injecting heroin--now THEY are infected, and each will go about their lives infecting others, and it just keeps spreading.

You can do the same with a cold virus--but it is even more easily spread---Mary the stewardess only has to sneeze on that crowded plane, and the tiny droplets of liquid she sends out will infect 20 people, who will infect everyone they touch or speak to.

Makes you want to wash your hands, right?

Because that is the best way to prevent viruses from spreading--simple hand washing!! well you kind of answered your own question. They spread around the world the same way. By blood or other bodily fluid contact Well, in the case of AIDS and HIV, you have to either have sex with someone that has the disease, and have an open wound that fluids can get into to, or get blood from that person into an open wound- like a needle stick with a dirty needle, or treating someone who has AIDS when you have an open sore and not using gloves. As far is it being spread around the world, all that has to happen is for someone that has the disease to go to another country, have sex with multiple partners, then go to somewhere else, or have the people they had sex with go somewhere else. It's really easy to understand if you think about travel methods these days, and how many people go from country to country.