A recent study in Austria conducted a large sample of 10 thousand people, including schoolchildren and teachers. The study showed that the infection of young school children frequently with SARS/-CoV-/2 virus is no different from that of their adult teachers. Since most children have no or few symptoms. Only the number of unreported cases is naturally high. Children inadvertently pass the infection on to siblings, parents and grandparents in the family. In other words, the belief that schools do not cause the spread of infection is not true at all.