Without these foods, people may experience problems with their immune system that is why it is very essential to have a dose of these every day. (pronutrics.co)
In the past, this breed was reported to have had problems with immune system development. (texaswestveterinarian.com)
Although parents and pediatricians often get frustrated when a child gets sick over and over, if the child is in daycare and is otherwise growing and developing normally, and if the child hasn't had any serious infections (like pneumonia or other infections that required hospitalization), then it isn't very likely that he or she has any kind of problem with her immune system. (verywellfamily.com)