Participate in the GCCR studies!

Thank you for your interest in participating. We have several studies you may participate in.
To help you choose, please take a look at what fits your interests in the table below. Hover with your pointer over each icon to read a description.
After clicking one of the links in the left column you will be able to read more detailed information about the study and whether you may qualify to participate in the study.

Focus How long? How often? What do I need?
Smell & Taste Challenge Awareness Under 5 min Daily Your own device and a beverage
Smell & Taste Self Check Loss 30 min Once or more at your own pace Your own  device and regular household items
COVID-19 Vaccination Long-COVID symptoms Under 10 min Once Your own device and COVID-19 vaccination records

Share the Smell & Taste Check

For more information about our Smell & Taste Challenge, please contact Kathrin Ohla (
For more information about our Smell & Taste Self Check, please contact Kathrin Ohla (


The GCCR is a group of 600 scientists, clinicians, and patient advocates across 50 countries founded in response to the COVID-19 pandemic.

Our goal is to collect evidence-based information to combat the spread of COVID-19.