"The Coming Plague" Will raise the hackles on the back of your head as well.
http://www.amazon.com/gp/product/0140250913/104-3123772-3973521?v=glance&n=283155
Read that book in college, and still have it on my shelf. Pick up once in a while when I am in the mood for a good scare.
Garret is one of those who is a bit worried over the avian flu also.