Unsupervised Machine Learning to Detect and Characterize Barriers to Pre-exposure Prophylaxis Therapy: Multiplatform Social Media Study

Qing Xu   ^{1, 2} , MAS ;   Matthew C Nali   ^{1, 2, 3} , BA ;   Tiana McMann   ^{1, 2, 3} , MA ;   Hector Godinez   ¹ , MA ;   Jiawei Li   ^{1, 2} , MS ;   Yifan He   ¹ , MS ;   Mingxiang Cai   ^{1, 2} , MS ;   Christine Lee   ⁴ , PharmD, PhD ;   Christine Merenda   ⁴ , MPH, RN ;   Richardae Araojo   ⁴ , PharmD, MS ;   Tim Ken Mackey   ^{1, 2, 3} , MAS, PhD

¹ S-3 Research, San Diego, CA, United States

² Global Health Policy and Data Institute, San Diego, CA, United States

³ Global Health Program, Department of Anthropology, University of California, La Jolla, CA, United States

⁴ Office of Minority Health and Health Equity, U.S. Food and Drug Administration, Silver Spring, MD, United States