My 7 years old son having one or other problem in the health. continuously falling sick due to fever, cold, cough and sometimes his ear drums are getting infected due to heavy mucus and doesn't eat food at all. Is my kid doesn't have proper immune system to fight with these problems, everytim the doctor gives antibiotics. How to improve the immunity naturally, which foods helps in doing this? can we give them the warm water with lemon and honey in the mornings or any time in day? please advise.