Capturing COVID-19–Like Symptoms at Scale Using Banner Ads on an Online News Platform: Pilot Survey Study

Brian E Dixon   ^{1, 2} , MPA, PhD ;   Sumit Mukherjee   ³ , PhD ;   Ashley Wiensch   ² , MPH ;   Mary L Gray   ^{4, 5} , PhD ;   Juan M Lavista Ferres   ³ , MSc ;   Shaun J Grannis   ^{2, 6} , MD, MSc

¹ Department of Epidemiology, Richard M Fairbanks School of Public Health, Indiana University, Indianapolis, IN, United States

² Center for Biomedical Informatics, Regenstrief Institute, Indianapolis, IN, United States

³ AI for Good Research Lab, Microsoft Corporation, Redmond, WA, United States

⁴ New England Lab, Microsoft Research, Cambridge, MA, United States

⁵ Luddy School of Informatics, Computing, and Engineering, Indiana University, Bloomington, IN, United States

⁶ Department of Family Medicine, Indiana University School of Medicine, Indianapolis, IN, United States