At the University of Witten/Herdecke an online registry has been set up where parents, doctors, pedagogues and others can enter their observations about the effects of wearing a mask to the children.
The results show that 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%), difficulty concentrating (50%), less happiness (49%), reluctance to go to school/kindergarten (44%), malaise (42%) impaired learning (38%) and drowsiness or fatigue (37%).