BACKGROUND: The effectiveness of repeated vaccination for influenza to prevent severe
cases remains unclear. We evaluated the effectiveness of influenza vaccination on …

Objectives: This study aimed to assess whether influenza vaccination reduces the risk of
severe and fatal outcomes in influenza inpatients aged≥ 65 years. Methods: During the …

Adults over the age of 60‐65 years suffer disproportionally from seasonal influenza,
experiencing high rates of complications, exacerbation of underlying medical comorbidities …

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

Influenza vaccination may limit the impact of influenza in the community. The aim of this
study was to assess the effectiveness of influenza vaccination in preventing hospitalisation …

Vaccination of the elderly is an important factor in limiting the impact of influenza in the
community. The aim of this study was to investigate the factors associated with influenza …

In Europe, annual influenza vaccination is recommended to elderly. From 2011 to 2014 and
in 2015–16, we conducted a multicentre test negative case control study in hospitals of 11 …

Introduction Influenza infection is common among institutionalized older adults. Many
nonrandomized observational studies on influenza vaccination suggested that it could …

The 50% reduced overall mortality previously associated with influenza vaccination among
the elderly was based on studies neither fully taking into account systematic differences …