They're these little plush toys of microbes of diseases and such...they're too fucking cute, but kinda disturbing at the same time...anyways here's a link to the main description of them:
http://www.thinkgeek.com/geektoys/plush/6708/ and a link to pics of all the little plushes:
http://www.thinkgeek.com/geektoys/plush/6708/images/