My daughter have an flu very bad. she have 7 months sorry my english is bad?

Flu-like illness: Your english is fine. If your daughter has fever, difficulty breathing, is not feeding properly or she is sleeping too much or irritable when awake she should be seen immediately by a pediatrician. It is not clear what you mean by 'very bad'. If you have any real worry better that she be seen than have you be sorry. Influenza (if that is what it is) can turn into severe bacterial infection.