Objectives Summary evidence of influenza vaccine effectiveness (IVE) against hospitalized
influenza is lacking. We conducted a meta-analysis of studies reporting IVE against …

Vaccination represents the most effective intervention to prevent infection, hospitalization
and mortality due to influenza. This meta-analysis quantifies data reporting influenza …

Background Evidence establishing effectiveness of influenza vaccination for prevention of
severe illness is limited. The US Hospitalized Adult Influenza Vaccine Effectiveness Network …

Background Ongoing assessment of influenza vaccine effectiveness (VE) is critical to inform
public health policy. This study aimed to determine the VE of trivalent influenza vaccine (TIV) …

Background No published meta-analyses have assessed efficacy and effectiveness of
licensed influenza vaccines in the USA with sensitive and highly specific diagnostic tests to …

Vaccination remains the most effective way to prevent influenza infection, albeit vaccine
effectiveness (VE) varies by year. Compared to other age groups, children and elderly adults …

Background Influenza vaccine efficacy/effectiveness can vary from season to season due in
part to the dominant circulating strains and antigenic matching. This study reviews the …

Background Several aggregate data meta-analyses have provided estimates of the
effectiveness of influenza vaccination in community-dwelling elderly people. However, these …

Background Influenza vaccine effectiveness (VE) can vary by type and subtype. Over the
past decade, the test-negative design has emerged as a valid method for estimation of VE …

Abstract During the 2011–2012 influenza season, we enrolled hospitalized adults with acute
respiratory illness and tested each for influenza using reverse transcription polymerase …