A reference and referral service for information on HIV/AIDS, viral hepatitis, sexually transmitted diseases (STDs), and tuberculosis (TB). - Information Dissemination: Collects and disseminates data and materials to support the work of prevention organizations and workers at international, national, state, and local levels. This includes facilitating program collaboration by sharing information, resources, published materials, research, and trends among the four diseases. - Public Health Collaboration: Connects public health partners through collaborative communication and innovative technology solutions, fostering partnerships to enhance disease prevention efforts. - Resource and Service Database: Maintains a comprehensive database of approximately 10,000 organizations providing services related to HIV/AIDS, viral hepatitis, STDs, and TB, including counseling, testing, prevention, education, and support. - Services for Public Health Professionals include educational materials, prevention resources, and training opportunities.