Tracking the Impact of COVID-19 and Lockdown Policies on Public Mental Health Using Social Media: Infoveillance Study

Minghui Li   ^{1, 2 *} , BA ;   Yining Hua   ^{3, 4 *} , BA ;   Yanhui Liao   ⁵ , MD ;   Li Zhou   ^{3, 4} , MD, PhD ;   Xue Li   ^{1, 2} , PhD ;   Ling Wang   ⁶ , PhD ;   Jie Yang   ^{1, 2} , PhD

¹ Department of Big Data in Health Science School of Public Health, and Center of Clinical Big Data and Analytics of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China

² The Key Laboratory of Intelligent Preventive Medicine of Zhejiang Province, Hangzhou, China

³ Department of Biomedical Informatics, Harvard Medical School, Boston, MA, United States

⁴ Division of General Internal Medicine and Primary Care, Department of Medicine, Brigham and Women’s Hospital, Boston, MA, United States

⁵ Department of Psychiatry, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China

⁶ Florence Nightingale Faculty of Nursing, Midwifery & Palliative Care, King’s College London, London, United Kingdom

*these authors contributed equally