Take 1 minute each day and help fight the outbreak in your community

  • Report your health daily even if you feel well
  • Help slow the outbreak near you
  • See how your area is affected

Join millions of people helping to fight COVID-19

If enough Americans share daily how they feel, even if they're well, 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.

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

Millions of people are now supporting our scientists to help the health services across the world.

Your participation can provide new insight into COVID, help identify those at risk sooner and support the health workers who are risking their own health to help us.

Tim Spector, MD FRCP FRSB, lead researcher

Professor of Genetic Epidemiology at King’s College London and Director of TwinsUK


Take 1-minute to report daily, even if you are well.

Help our scientists identify:

  • High-risk areas
  • Who is most at risk, by better understanding symptoms linked to underlying health conditions
  • How fast the virus is spreading in your area

COVID Symptom Tracker 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:

This app was built in the US to support the Nurses’ Health Study. This is one of the largest and longest-running scientific studies in the world with 280,000 participants stretching back to 1976. Many participants in the Nurses' Health Study are still active healthcare workers who are treating people with COVID across the country and risking their own health to help us. The app is now available to anyone in the US or UK who wants to help.

In response to recommendations by Stand Up To Cancer (SU2C), the app also includes questions for cancer patients and survivors, such as if they are living with cancer, what type of cancer and what treatment they are receiving. The medical community knows that individuals with cancer and those receiving anti-cancer therapy are at increased risk for getting COVID-19. “There is too much we don’t know about COVID-19 in the cancer community,” stated Stand Up To Cancer CEO Sung Poblete, PhD, RN. “This data will be invaluable to assess how best to support this high-risk community, and for cancer patients and survivors to contribute to combatting this pandemic.”

Prof. Spector created and runs TwinsUK, which is a scientific study of 15,000 identical and non-identical twins that has been running for nearly three decades. As well as using the app to study symptoms in the general population, TwinsUK is using it to understand how symptoms develop with participating twins. Their research is funded by the Wellcome Trust and the National Institute for Health Research.

News and alerts

Signup for news and alerts about COVID Symptom Tracker

Thank you. Please check your email and confirm your subscription to our mailing list.
Oops! Something went wrong while submitting the form. Please try again

Collaborating on the science

If you're doing research on COVID-19 and you want to contribute or believe this initiative can help your efforts, please let us know at [email protected]

Please contact us only if you're a public health organization, government, academic, scientific, research or health institution or charity.