National HIV Surveillance System"The National HIV Surveillance System (NHSS) is the primary source of HIV data for monitoring cases of HIV infection in the United States and 6 U.S. territories and freely associated states (American Samoa, Guam, Northern Mariana Islands, Puerto Rico, Republic of Palau, U.S. Virgin Islands). The data are reported by laboratory and health care providers to state or local surveillance programs, who in turn report the data to CDC."