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Starting in Spring 2026 we are inviting about 2.5 million participants in the REACT Study to take part in an additional online Survey.   

If you have received an email invitation from the Study’s address admin@react.imperial.ac.uk, it’s because you have previously participated in a REACT study and gave us permission to contact you about future research opportunities. It is entirely up to you whether you decide to participate in this Study. Text message invitations from REACT study may be sent if we think your email invitation hasn’t reached you.   

To take part in the study you need to follow the instructions in your email invitation. You will be taken to a short online survey that will take around 10 minutes to complete.   

At the end of the survey, you will be invited to do an online hearing test. The assessment will take around 5 minutes to complete, and you can choose to view a summary report of your test scores relative to all other people who have undertaken the test.   

We are also asking you to keep food diary, which involves inputting everything you eat and drink for 2 days (1 weekday and 1 day on the weekend). On completion you can choose to view feedback on your nutrition. 

The study aims to further our understanding of what differences exist between those who have had Long COVID and those who haven’t and the links to long-term health and wellbeing.   

More information on this Study can be found in the REACT Participant Information Sheet