Viruses

About viruses in general:

http://www.cellsalive.com/phage.htm

http://www.microbe.org/microbes/virus1.asp

http://www.microbe.org/microbes/friend_or_foe.asp

http://science.howstuffworks.com/virus-human2.htm

http://science.howstuffworks.com/virus-human6.htm

http://www.webmd.com/hw/lab_tests/hw235580.asp

About specific viruses:

http://yucky.kids.discovery.com/noflash/askwendell/answers/980119warts.html

http://health.discovery.com/centers/coldsflu/ultguideflu/abcs.html

http://health.discovery.com/centers/coldsflu/ultguideflu/inside.html

http://www.webmd.com/content/article/95/103396.htm

http://www.webmd.com/content/article/114/111306.htm

http://www.webmd.com/hw/infection/uf4421.asp

http://www.webmd.com/content/article/113/110741.htm