title: Seasonal influenza and vaccine herd effect.
abstract: The seasonal influenza vaccine programs in many regions aimed to protect most vulnerable population, but current trivalent influenza vaccine does not provide sufficient effectiveness among people under high risk for severe outcome of the influenza. The vaccine herd effect (VHE) is the extra protection of non-immune high risk persons, with increase of immunity among vaccinated healthier persons which prevents circulation of influenza in the community. Accumulating evidences are supporting the immunization of extended population with regard to the VHE.
authors.affiliation: Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University College of Medicine, Seoul, Korea.
authors.forename: Tae Hyong
authors.identifier: 0000-0003-2920-9038
authors.initials: TH
authors.lastname: Kim
keywords: Influenza vaccine; Vaccine herd effect; Vaccine herd immunity