Scaling Up CareKit: Lessons Learned from Expansion of a Centralized Home HIV and Sexually Transmitted Infection Testing Program

Despite advances in implementing human immunodeficiency virus (HIV)/sexually transmitted infection (STI) services for men who have sex with men (MSM), many remain underserved because of barriers like stigma, low facility coverage, and provider competency. This article describes the implementation of centralized nationwide mailed HIV/STI home testing (CareKit). METHODS: The Emory Center for AIDS Research developed CareKit for research study participants to request HIV self-test kits, STI specimen collection kits, and condom/lubricant packs to be shipped to any mailing address in the United States. Sexually transmitted infection kits were customized according to study needs and could include materials to collect whole blood, dried blood spots, urine sample, and rectal and pharyngeal swab samples for syphilis, gonorrhea, and chlamydia testing. Specimens were mailed back to a central Clinical Laboratory Improvement Amendments–approved laboratory for testing, and results were returned to participants. RESULTS: CareKit was used by 12 MSM studies and mailed 1132 STI kits to 775 participants between January 2018 and March 2020. Participants returned 507 (45%) STI kits, which included 1594 individual specimens. Eighty-one kits (16%) had at least one positive STI test result: pharyngeal chlamydia (n = 7), pharyngeal gonorrhea (n = 11), rectal chlamydia (n = 15), rectal gonorrhea (n = 12), genital chlamydia (n = 6), genital gonorrhea (n = 1), and syphilis (n = 54). In this same 2-year period, 741 HIV self-test kits were mailed to 643 MSM. CONCLUSIONS: CareKit successfully met studies' needs for home HIV/STI testing and diagnosed many STIs. These processes continue to be adapted for research and programs. The ability to mail home test kits has become increasingly important to reach those who may have limited access to health care services, particularly during the COVID-19 pandemic.