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Influenza viruses exhibit a fascinating level of antigenic heterogeneity that facilitates re-infection in the human population. The human antibody repertoire also manifests endless capability for variation in the genes that specify the portion of antibody molecules interacting with epitopes. A recent explosion of techniques for isolating human monoclonal antibodies to viruses has led to isolation...
Pneumococcal pneumonia is a major cause of morbidity and mortality worldwide. Efficacy of pneumococcal conjugate vaccines (PCV) in reducing childhood pneumonia has been estimated in four double-blind, randomized, controlled trials. An investigational 11-valent pneumococcal conjugate vaccine (11PCV) had an efficacy of 22.9% against radiologically defined pneumonia during first 2 years of life in Filipino...
Immunogenicity of 12 capsular polysaccharides (CPS) from Streptococcus pneumoniae did not correlate with pre-existing levels of natural IgM anti-CPS antibodies in mice. Immunization of mice with individual CPS, with the exception of type 14 (the only neutral CPS tested), increased serum IgM that also bound other CPS serotypes independent of structural similarity or commonly known contaminants. Surprisingly...
Individuals living in malaria endemic areas are subject to repeated infections yet fail to develop sterilizing immunity, however, immunization of mice with attenuated sporozoites or subunit vaccines has shown the ability to protect mice against a sporozoite challenge. We recently reported that mice primed with dendritic cells coated with the dominant circumsporozoite CD8 T cell epitope from Plasmodium...
Since whooping cough is reemerging in the Netherlands from 1996 onwards, several changes in the national immunization program have been implemented regarding the pertussis vaccinations. The aim of this study is to investigate IgG responses in whole cell (wP) and acellular (aP) pertussis vaccine primed children following revaccination with different pertussis booster vaccines at 4 years of age. IgG...
In the Netherlands the meningococcal serogroup C conjugate (MenCC) vaccine is administered as a single dose at 14 months. We evaluated the kinetics of isotype-specific antibodies in adults (n=21) after primary immunization with MenCC or secondary immunization with MenCC or plain MenC polysaccharide vaccine. Blood samples were collected prior to immunization and at 6 additional time points, from 3...
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