This study developed methods and determined the impact of influenza vaccination on
elderly persons in 3 large health plans: Kaiser Permanente Northwest, HealthPartners, and …

Background. Although annual influenza immunization is recommended for adults aged≥ 65
years due to the substantial burden of illness, the evidence base for this recommendation is …

Background. Hospitalization of older adults during the period of influenza vaccination in the
fall of each year presents a barrier to immunization against influenza. This study evaluates a …

This serial cohort study assessed the risk of hospitalization or death associated with
influenza and the effectiveness of influenza vaccination among subgroups of elderly …

Background. The impact of influenza vaccination on major cause-specific hospitalization
and the duration of hospital stay is rarely reported. Our purpose was to study the effect of …

Objective To compare young and elderly adults in terms of their immune responses and
rates of infection following intranasal vaccination with a live attenuated influenza virus …

Available strategies to increase influenza vaccination rates in the elderly have not been
tested in the private sector where most elderly receive care. We performed a randomized …

Background As compared with a standard-dose vaccine, a high-dose, trivalent, inactivated
influenza vaccine (IIV3-HD) improves antibody responses to influenza among adults 65 …

To determine if newer influenza vaccines can safely improve seroprotection rates of older
adults, we compared three licensed trivalent inactivated vaccines (TIVs) in a randomized …

Background. Current evidence supporting the effectiveness of influenza vaccine in
preventing hospitalizations in older adults is insufficient. Methods. During 3 influenza …