When my kids start like that , that means bronchitis is next, they get caughing spells in the morning and at night. My oldest is borderline ashmatic and she has been receiving the flu shot since she was 3 yrs old, believe it or not it makes a world of a difference for her, the little one started getting it too at the same age because she's very prone to bronchitis and since bronchitis ans ashma is something that runs in both sides of the family , the doctor decided to start giving it to her as prevention. It works wonders for them.