Direct and Indirect Benefits of Influenza Vaccination in Schools and Households

Direct and Indirect Benefits of Influenza Vaccination in Schools and Households

The purpose of this study is to determine the degree of indirect benefits to family members and classmates resulting from administration of influenza vaccine to children.

Inclusion Criteria:

• Hong Kong residents aged between 7 and 11 and their family members.

Exclusion Criteria:

• Children with history of hypersensitivity to eggs, egg proteins, gentamicin, gelatin, or arginine or with life-threatening reactions to previous influenza vaccinations.
• Children receiving aspirin therapy or aspirin-containing therapy.
• Children with asthma or active wheezing.
• Children or family members with underlying immunocompromised condition or receiving immunosuppressive agents.