English site

http://biology.about.com
http://www.biology-online.org
http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookTOC.html
The Big Picture book of Viruses
http://www.virology.net/Big_Virology/BVHomePage.html
The Garry Laboratory
http://www.tulane.edu/~dmsander/GarryHomePage.html