Most of the content on this site is original and copyrighted.
Some of the information has been taken from the Centers for Disease Control and is in the public domain.

Many of the images here are used under a Creative Commons license.
We would like to thank the following people for putting their images in the public domain:

kr4gin: http://www.flickr.com/photos/kr4gin/415506129/
tademracer: http://www.flickr.com/photos/tandemracer/833281323/
brykmantra: http://www.flickr.com/photos/brykmantra/76765412/
Joi Ito: http://commons.wikimedia.org/wiki/File:LarryBrilliantJI1.jpg