Table of Contents
Influenza Research and Treatment
Volume 2011, Article ID 419216, 6 pages
http://dx.doi.org/10.1155/2011/419216
Review Article

Influenza Vaccination in the Face of Immune Exhaustion: Is Herd Immunity Effective for Protecting the Elderly?

1Department of Internal Medicine, Rehabilitation and Geriatrics, Medical school and University Hospitals of Geneva, CH-1226 Thônex-Geneva, Switzerland
2Translational Medicine Research Group, Cranfield Health, Cranfield University, Cranfield MK43 0AL, UK
3Nutrition Unit, Medical school and University Hospitals of Geneva, CH-1205 Geneva, Switzerland

Received 13 November 2011; Accepted 22 December 2011

Academic Editor: Zichria Zakay-Rones

Copyright © 2011 Pierre Olivier Lang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

At the start of the 21st century, seasonal influenza virus infection is still a major public health concern across the world. The recent body of evidence confirms that trivalent inactivated influenza vaccines (TIVs) are not optimal within the population who account for approximately 90% of all influenza-related death: elderly and chronically ill individuals regardless of age. With the ever increasing aging of the world population and the recent fears of any pandemic influenza rife, great efforts and resources have been dedicated to developing more immunogenic vaccines and strategies for enhancing protection in these higher-risk groups. This paper describes the mechanisms that shape immune response at the extreme ages of life and how they have been taken into account to design more effective immunization strategies for these vulnerable populations. Furthermore, consideration will be given to how herd immunity may provide an effective strategy in preventing the burden of seasonal influenza infection within the aged population.