These links will connect you to talks on a wide variety of health related topics. You may need to register in order to view a lecture.
"The goal of the Public Health Image Library (PHIL) is to offer "an organized, universal electronic gateway to the Center for Disease Control's pictures." The site welcomes public health professionals, laboratory scientists, students and the general public to use this material for reference, teaching, presentation, and public health messages." Images freely usable from the CDC on many different public health topics. Searchable