CDC National Prevention Information NetworkThe CDC National Prevention Information Network (NPIN) is the U.S. reference and referral service for information on HIV/AIDS, viral hepatitis, sexually transmitted diseases (STDs), and tuberculosis (TB). NPIN collects, catalogs, processes, and electronically disseminates materials and information on HIV/AIDS, viral hepatitis, STDs, and TB to organizations and people working in those disease fields in international, national, state, and local settings. All NPIN services are designed to facilitate sharing of information and resources on education and prevention services, published materials, research findings, and trends among users.