Some of the scientific studies you may want to read :
Research demonstrates Influenza vaccination to be inneficient
Prevention of leptospirosis in cuba
Homeonetresearch.ca
A Canadian research network on Homeopathy
American College of Homeopathy (Research)
Homeopathy and AIDS
Homeopathy and Cancer
50 years of research... (text in French)
Scientific Validation of non conventional medecines (text in French)
Homeopathy and Menopause