Persons at increased risk for influenza complications

1. children aged <2 years;
2. adults aged ≥65 years;
3. persons with chronic pulmonary (including asthma), cardiovascular (except hypertension alone), renal, hepatic, hematological (including sickle cell disease), metabolic disorders (including diabetes mellitus) or neurologic and neurodevelopment conditions (including disorders of the brain, spinal cord, peripheral nerve, and muscle such as cerebral palsy, epilepsy/seizure disorders, stroke, intellectual disability/mental retardation, moderate to severe developmental delay, muscular dystrophy, or spinal cord injury);
4. persons with immunosuppression, including that caused by medications or by HIV infection;
5. women who are pregnant or postpartum (within 2 weeks after delivery);
6. persons aged <19 years who are receiving long-term aspirin therapy;
7. American Indians/Alaska Natives;
8. persons who are morbidly obese (i.e., BMI ≥40); and
9. residents of nursing homes and other chronic care facilities.