Hello, My 3 year 6 month daughter very often follow in sick, cough, cold, and runny nose, she will not be to sleep at nit, and once its come it will take 10-15 to recovery, if she recovery again she get it in week. We have consultant Pediatrician, they say its because of immune system also for duct, food, and other allergic problems. I am worried about her health. We don't give her any kind of out side product still I am not able to keep are out of this. Please do tell me good food which we can improve her immune and be healthy.