Needle-exchange programmes are supported by the CDC and the National Institute of Health. The NIH estimated in 2002 that in the United States, between 15 and 20% of injection drug users have HIV and at least 70% have hepatitis C. The Centers for Disease Control (CDC) reports 1/5 of all new HIV infections and the vast majority of Hepatitis C infections are the result of injection drug use. United States Department of Health and Human Services reports 7%, or 2,400 cases of HIV infections in 2018 were among drug users. Between 1989 and 1992, three exchanges in New York City tagged syringes to help with tracking them.