Families around the world are in exceptional situations; parents are worried about their health, their financial existence and above all about the health of their children. So far, there is only an extremely small amount of data from non-European countries that have tested positive for corona diseases and corona AKs in children, considering the burden of disease / worries. Little is thus known about the duration of the prodromal stages or child-specific symptoms, so that little is known about the development of the course of the disease, the duration of virus excretion after infection, and the importance of “immunization” in children as possible sources of infection. Due to the absolute novelty of the occurrence of a COVID virus pandemic, this project can generate fundamentally new insights into the spread by children, the treatment of children and the severity of the disease and long-term progress in Germany [how does the relate to your first sentence about ‘non-European countries?]. Participation in the Corona child study gives families the opportunity to actively and effectively observe and document the state of health of their child in a situation that most parents perceive to be threatening, and to actively and effectively observe and document the state of health of their child [repetition] and thus, in the sense of citizen science research (Parent empowerment), to help develop a better understanding of the epidemiological relationships of coronavirus infections and their significance for childhood.