Age-specific seasonal influenza vaccine effectiveness against different influenza subtypes in the hospitalized population in lithuania during the 2015–2019 influenza seasons
Background: Continuous monitoring of seasonal influenza vaccine effectiveness (SIVE) is needed due to the changing nature of influenza viruses and it supports the decision on the annual update of vaccine composition. Age-specific SIVE was evaluated against different influenza sub-types in the hospitalized population in Lithuania during four influenza seasons. Methods: A test-negative case-control
