I found this site from Ewen Del.icio.us post on his blog. Its a game produced by the Federation of American Scientists. This is a good resource for teachers of science, biology and health. The game is played witha 3d simulation where you control a robot within the body.
Here is their blurb…
“The Federation of American Scientists (FAS) presents Immune Attack™, an educational video game that introduces basic concepts of human immunology to high school and entry-level college students. Designed as a supplemental learning tool, Immune Attack aims to excite students about the subject, while also illuminating general principles and detailed concepts of immunology.
To learn more about the game visit the Teacher Guide, Game Guide and System Requirements.”