Tracking Self-reported Symptoms and Medical Conditions on Social Media During the COVID-19 Pandemic: Infodemiological Study

Qinglan Ding   ^{1, 2} , MBBS, PhD ;   Daisy Massey   ¹ , BA ;   Chenxi Huang   ¹ , PhD ;   Connor B Grady   ³ , MPH ;   Yuan Lu   ^{1, 4} , ScD ;   Alina Cohen   ⁵ , MSc, MBA ;   Pini Matzner   ⁵ , PhD ;   Shiwani Mahajan   ^{1, 4} , MBBS, MHS ;   César Caraballo   ^{1, 4} , MD ;   Navin Kumar   ^{6, 7} , MPhil ;   Yuchen Xue   ⁸ , MA ;   Rachel Dreyer   ⁹ , PhD ;   Brita Roy   ^{3, 10} , MD, MPH, MHS ;   Harlan M Krumholz   ^{1, 4, 11} , MD, SM

¹ Center for Outcomes Research and Evaluation, Yale New Haven Hospital, New Haven, CT, United States

² College of Health and Human Sciences, Purdue University, West Lafayette, IN, United States

³ Department of Chronic Disease Epidemiology, Yale School of Public Health, New Haven, CT, United States

⁴ Section of Cardiovascular Medicine, Department of Internal Medicine, Yale School of Medicine, New Haven, CT, United States

⁵ Skai, Tel-Aviv, Israel

⁶ Department of Sociology, Yale University, New Haven, CT, United States

⁷ Institute for Network Science, Yale University, New Haven, CT, United States

⁸ Foundation for a Smoke-Free World, New York, NY, United States

⁹ Department of Emergency Medicine, Yale School of Medicine, New Haven, CT, United States

¹⁰ Department of Medicine, Yale School of Medicine, New Haven, CT, United States

¹¹ Department of Health Policy and Management, Yale School of Public Health, New Haven, CT, United States