Interaction Patterns of Men Who Have Sex With Men on a Geosocial Networking Mobile App in Seven United States Metropolitan Areas: Observational Study

Nadia N Abuelezam   ¹ , ScD ;   Yakir A Reshef   ² , PhD ;   David Novak   ³ , MSW ;   Yonatan Hagai Grad   ^{4, 5} , MD, PhD ;   George R Seage III   ⁶ , MPH, ScD ;   Kenneth Mayer   ⁷ , MD ;   Marc Lipsitch   ^{6, 8} , DPhil

¹ William F Connell School of Nursing, Boston College, Chestnut Hill, MA, United States

² Department of Computer Science, Harvard University, Cambridge, MA, United States

³ DSN Consulting, LLC, Boston, MA, United States

⁴ Department of Immunology and Infectious Disease, Harvard TH Chan School of Public Health, Boston, MA, United States

⁵ Division of Infectious Disease, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States

⁶ Department of Epidemiology, Harvard TH School of Public Health, Boston, MA, United States

⁷ The Fenway Institute, Boston, MA, United States

⁸ Center for Communicable Disease Dynamics, Boston, MA, United States