I know a little one that was sick since 3 months of age with all of the above. When he came to live with me when he was 18 months. I had tubes put in his ears, he gets allergy shots, he takes Zyrtec. He has been infection free for 5 months now. But there is no telling what damage all of those antibiotics have done to his tummy. I gave him lots of yogurt. He is well now.