National Prevention Information Network: HIV/AIDS"The 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."