Your child goes to nursery, kindergarten or school and you are afraid of frequent infections? Or maybe you just have the feeling that your child catches a cold too often and has a runny nose, cough or fever? Therefore, we explain whether probiotics increase immunity, at what age a child can be vaccinated against influenza and which supplements from the pharmacy (e.g. with lactoferrin, beta-glucan, colostrum) can best strengthen immunity in children.