The third Corona winter is approaching. Politicians promise that schools and daycare centers will remain open. What does this mean for children’s health? How immune are the youngest to Corona? And from what age should you get the booster vaccination? Prof. Johannes Liese, Head of the Department of Children’s Infectious Diseases and Immunology at the University Children’s Hospital in Würzburg, provides the answers. In the interview, he also says why he considers the RS virus to be significantly more dangerous in small children than the corona virus. Most children have now survived a corona infection.