CD4 and infection: 4. Include: race and/or ethnicity data, CD4 count and/or HIV staging, gender, sexual orientation data, residence data, socioeconomic data elements (i.e., income, poverty level, educational), data elements related to migration (i.e., country of infection or country of origin, immigration) and additional variables (i.e., insurance, coverage, incarceration status, occupation, homeless, pre-exposure prophylaxis [PrEP], reason for test) (n=12).