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

Sterilising immunity that blocks infection for life, and thus prevents illness after infection, is
the ultimate goal for vaccines. Neither influenza infection nor vaccination provide sterilising …

Background Multivalent influenza vaccine products provide protection against influenza A
(H1N1) pdm09, A (H3N2), and B lineage viruses. The 2018–2019 influenza season in the …

Background Little is known about inactivated influenza vaccine effectiveness (IVE) in
preventing very severe disease, including influenza-associated intensive care unit (ICU) …

Observational studies have consistently shown that influenza vaccine effectiveness (VE) is
lower for H3N2 relative to H1N1pdm09 and type B, and this is not entirely explained by …

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 We examined the influence of some factors on seasonal influenza vaccine
effectiveness (VE) from test-negative design (TND) studies. Methods We systematically …

Background Conflicting results regarding the impact of repeated vaccination on influenza
vaccine effectiveness (VE) may cause confusion regarding the benefits of receiving the …

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

Introduction: Influenza vaccination is regarded as the most effective way to prevent influenza
infection. Due to the rapid genetic changes that influenza viruses undergo, seasonal …