Corona children studies “Co-Ki”: First results of a Germany-wide registry on mouth and nose covering (mask) in children

Background: Narratives about complaints in children and adolescents caused by wearing a mask are
accumulating. There is, to date, no registry for side effects of masks.

Methods: At the University of Witten/Herdecke an online registry has been set up where parents, doctors,
pedagogues and others can enter their observations. On 20.10.2020, 363 doctors were asked to make
entries and to make parents and teachers aware of the registry.

Results: By 26.10.2020 the registry had been used by 20,353 people. In this publication we report the
results from the parents, who entered data on a total of 25,930 children. The average wearing time of the
mask was 270 minutes per day. Impairments caused by wearing the mask were reported by 68% of the
parents. These included irritability (60%), headache (53%), diculty concentrating (50%), less happiness
(49%), reluctance to go to school/kindergarten (44%), malaise (42%) impaired learning (38%) and
drowsiness or fatigue (37%).