where can i go to learn specifically about how to become an infectious disease specialist?

Answer 1

1) 4 years college
2) 4 years med school
3) 3 years (+/-) internship
4) infectious disease fellowship

Answer 2

Try the Association of Publlic Health Laboratories fellowship site:
http://www.aphl.org/training_and_fellowships/fellowships/

Also the National Center for Infectious Diseases training site at Center for Disease Contro (CDC):
http://www.cdc.gov/ncidod/training.htm