Why am I asked my demographic information, including my race and date of birth?

Why am I asked my demographic information, including my race and date of birth?

The laboratory that processes the tests needs to identify the sample to the person who provides the sample, requiring a date of birth. Also, all positive test results  must be reported to the Illinois Department of Public Health in accordance with the Illinois Control of Communicable Diseases Code (77 Ill. Adm. Code 690.200(a)(5)); demographic information is required for this reporting process.