Gender Ethnicracial And Life Span Considerations

The incidence of influenza cases is highest in school-age children and generally decreases with age, probably because of immunity established by repeated infections as people age. During an outbreak of the disease, however, elderly persons and those disabled by chronic illnesses are most likely to develop severe complications. Males and females of all races and ethnicities are equally susceptible. During the third trimester of pregnancy, women are at high risk for complications of influenza A and B.

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