Public Health Images Library (PHIL)Created by a Working Group at the Centers for Disease Control and Prevention (CDC), PHIL offers an organized, universal electronic gateway to CDC's pictures. Public health professionals, the media, laboratory scientists, educators, and the worldwide public are welcome to use this material for reference, teaching, presentation, and public health messages. The content is organized into hierarchical categories of people, places, and science, and is presented as single images, image sets, and multimedia files.