Those who should not get the nasal spray vaccine include:
- Children younger than 2 years old
- Children 2 years through 17 years of age who are receiving aspirin therapy or aspirin-containing therapy
- Children 2 through 4 years old who have asthma or who have had a history of wheezing in the past 12 months
- Anyone who is allergic to eggs
- Pregnant women, though they need not avoid contact with anyone who has gotten the nasal vaccine