Surveillance
Surveillance means the temporary supervision by a public health official (or designee) of an individual or group, who may have been exposed to a quarantinable communicable disease, to determine the risk of disease spread.
Source
42 CFR § 71.1
Scoping language
The provisions of this part contain the regulations to prevent the introduction, transmission, and spread of communicable disease from foreign countries into the States or territories (also known as possessions) of the United States. Regulations pertaining to preventing the interstate spread of communicable diseases are contained in 21 CFR parts 1240 and 1250 and 42 CFR part 70.