CDC data systems collecting behavioral data on HIV counseling and testing.

This paper describes two systems, the HIV Counseling and Testing Data System and the National Health Interview Survey, AIDS Knowledge and Attitudes Supplement, that collect behavioral information on HIV counseling and testing in the United States. Together these data sources provide valuable information for planning and evaluating counseling and testing programs. While these two systems are not designed primarily for behavioral research, they both collect behavioral data, including the behavioral risk category of persons being tested.