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Data on the immunogenicity and memory induction of pneumococcal conjugate vaccines in very preterm infants is limited. We vaccinated 69 full term and 68 preterm infants (median gestational age (GA) 30 weeks) with a 7-valent pneumococcal conjugate vaccine (PCV7) at 2/3/4 months of age, followed by a plain polysaccharide booster at 12 months of age. IgG-GMC (ELISA) was significantly lower in preterm...
The introduction of meningococcal serogroup C conjugate vaccines into the UK immunisation schedule has led to the decline of serogroup C disease in those vaccinated but there is no imminent vaccine solution for serogroup B disease. The PorA outer membrane protein (OMP) is a potential serogroup B vaccine candidate and an outer membrane vesicle (OMV) vaccine containing six different PorA OMPs (each...
Few data are available on the kinetics of meningococcal serogroup C-specific antibody production following meningococcal serogroup C conjugate (MCC) vaccination, particularly in those who have received prior meningococcal A/C polysaccharide (MACP) vaccination(s). Laboratory staff who had previously received either one dose (n=35), two doses (n=18) of MACP vaccine or who were naı̈ve to previous meningococcal...
Widespread use of meningococcal A and C polysaccharide (MACP) vaccines has raised concerns about induction of hyporesponsiveness to these polysaccharides. Immunological hyporesponsiveness to C polysaccharide has been clearly documented in infants, children and adults but only limited data from Gambian children are available for A polysaccharide. We investigated whether a second dose of MACP, given...
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