DrugLib.com — Drug Information Portal

Rx drug information, pharmaceutical research, clinical trials, news, and more



Antibody and Th1-type cell-mediated immune responses in elderly and young adults immunized with the standard or a high dose influenza vaccine.

Author(s): Chen WH, Cross AS, Edelman R, Sztein MB, Blackwelder WC, Pasetti MF

Affiliation(s): Center for Vaccine Development, University of Maryland School of Medicine, Baltimore, MD 21201, USA. wchen@medicine.umaryland.edu

Publication date & source: 2011-04-05, Vaccine., 29(16):2865-73. Epub 2011 Feb 23.

Publication type: Comparative Study; Multicenter Study; Randomized Controlled Trial; Research Support, N.I.H., Extramural

A comparative analysis of antibody and cell-mediated immune responses was performed in ambulatory medically stable elderly and young adults who received the standard-dose of trivalent inactivated influenza vaccine, containing 15 mug of hemagglutinin (HA) per virus strain, or a high-dose vaccine containing 60 mug HA per virus strain. Among the elderly, the high dose vaccine induced greater HAI (hemagglutination inhibition) and virus neutralization antibody titers than the standard dose vaccine. These responses, however, did not achieve the magnitude of those induced by the standard dose vaccine in young adults. Vaccine-specific circulating T cells producing IFN-gamma were detected in the elderly and young adults following immunization. However, there were no significant differences in the IFN-gamma responses among groups. On the other hand, the standard dose vaccine in the elderly resulted in the highest proportion of complete non-responders who failed to elicit either an HAI or an IFN-gamma response. This study provides further evidence that a higher dose vaccine for the elderly may result in enhanced immune responses which are predicted to improve protection although still of lower magnitude than those induced in younger healthier individuals. Copyright (c) 2011 Elsevier Ltd. All rights reserved.

Page last updated: 2011-12-09

-- advertisement -- The American Red Cross
 
Home | About Us | Contact Us | Site usage policy | Privacy policy

All Rights reserved - Copyright DrugLib.com, 2006-2017