My research interests are the epidemiology and prevention of infectious and tropical diseases of public health importance, both internationally and domestically, with a primary focus on HIV and AIDS. My work is funded primarily by the Centers for Disease Control and Prevention through the Presidential Emergency Plan for AIDS Relief. I also have smaller projects dealing with the epidemiology of tuberculosis in California, the prevention of childhood injury, immunizations and bioterrorism. I am a member of the AIDS Research Institute's Executive Committee.