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Read how about how our app is helping to predict COVID-19 hotspots

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Join millions of individuals sharing how they feel to combat the new surge in cases around the country. Together we can beat the disease and get through this crisis.

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Developed by the health science company ZOE in collaboration with scientists and physicians at King's College of London and Massachusetts General Hospital

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Our researchers are working day and night to try and understand COVID better. From how COVID spreads, to new symptoms. This is shared with doctors, and published in the top academic journals. Discover what you have made possible on our News & Research Page.

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Andrew ChanAndrew Chan

Andrew Chan, MD, MPH

Lead researcher, Professor of Medicine, Harvard Medical School, Professor of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Chief of the Clinical and Translational Epidemiology Unit, CTEU Massachusetts General Hospital

This app can provide the healthcare system with critically valuable information. This app-based study is a way to find out where the COVID hot spots are, new symptoms to look out for, and might be used as a planning tool to target quarantines, send ventilators and provide real-time data to plan for future outbreaks.

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COVID Symptom Study in the press

About this research

The COVID symptom tracker was created by doctors and scientists at Massachusetts General Hospital, the Harvard T.H. Chan School of Public Health, King's College London and Stanford University School of Medicine, working codeveloped with ZOE – a health science company. The app will be used to study the symptoms of COVID-19 and track the spread of this virus.



This research is led by:

  • Prof. Tim Spector - Professor of Genetic Epidemiology at King’s College London and Director of TwinsUK;
  • Prof. Andrew Chan - Professor of Medicine at Harvard Medical School, Professor of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health and Chief of the Clinical and Translational Epidemiology Unit, CTEU Massachusetts General Hospital
  • Prof. Christopher Gardner, Rehnborg Farquhar- Professor of Medicine at Stanford University Prevention Research Center.

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Call for Investigators of Cohort and Clinical Studies

We are reaching out to investigators of cohort and clinical studies to join our efforts through a Coronovirus Pandemic Epidemiology (COPE) consortium in which cohorts (e.g., population based, clinic, etc.) and clinical studies could deploy this tool at no cost.

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