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Third study round (March/April 2021)

Dear study participant,

The 3rd KoCo19 study round started in March 2021 and has been completed since 30 April 2021. Thank you very much for returning the blood samples/filter papers. Now the analysis and evaluation of the laboratory results will take place.

In addition to receiving your blood sample, we are very grateful if you support our research by filling out the questionnaires. If you have not yet filled them out, this is still possible. The questionnaires are available under the following link:

If you have any questions, please contact our study hotline.  
Thank you for your participation!

Your KoCo19 study team

For study participants:
PCR-testing/Nasopharyngeal swab

To make an appointment please contact our team via the KoCo19 telephone hotline (089 4400-59866) or by email to

Appointments will be available starting 7 April, 2021, Monday - Friday between 10am and 11am.

Please note that appointments will no longer be assigned via the online booking system.

The operation of the COVID-19 Testing Unit (CTU) at Georgenstraße will end in March 2021. PCR testing for study participants will take place in the tent at the back building (parking lot area) of the outpatient clinic (Leopoldstraße 5).


KoCo19 telephone hotline: +49 (0)89 4400-59866

Monday to Friday
9:00 to 12:00

Monday and Wednesday
15:00 to 18:00


Please contact the central KoCo19 study hotline with all queries regarding your study participation (e.g. test kit etc.). For logistical reasons, we ask you to no longer contact our study teams directly ("random walk"/home visit teams of the first study round). These communications are now managed via our KoCo19 study hotline (see above).

Service for study participants:
Option to determine your antibody titer after COVID-19 vaccination

As a study participant, we offer you the possibility to have your antibody status determined after a vaccination. You can make an appointment via our study hotline (see contact details above).

KoCo19 in the media

Media reports about the KoCo19 study (view more, in German):