Objective: To quantify the protective efficacy of influenza vaccine in elderly persons. Data
Sources: A MEDLINE search was done using the index terms influenza vaccine, vaccine …

Objective: Each year, influenza and its complications account for 10,000-40,000 excess
deaths in the United States. Over 80% of these deaths occur among the elderly. The …

Background Influenza vaccination has consistently been shown to prevent all-cause death
and hospitalizations during influenza epidemics among seniors. However, such benefits …

Background Reliable estimates of the effectiveness of influenza vaccine among persons 65
years of age and older are important for informed vaccination policies and programs. Short …

Influenza virus is a common pathogen implicated in respiratory tract infections, annually
affecting up to 20% of the general population, and pneumonia is a leading cause of death …

Background Despite recommendations for annual vaccination against influenza, more than
half of elderly Americans do not receive this vaccine. In a serial cohort study, we assessed …

Background. The effectiveness of influenza vaccination against hospitalization and death
can only ethically be assessed in observational studies. A concern is that individuals who …

Background Influenza vaccination of elderly individuals is recommended worldwide. Our
aim was to review the evidence of efficacy and effectiveness of influenza vaccines in …

Background Vaccination rates for healthy senior citizens are lower than those for senior
citizens with underlying medical conditions such as chronic heart or lung disease …

Background Influenza-related morbidity and mortality have been extensively studied with
hospital and reimbursement data. However, little is known about the effectiveness of the …