Article Text
Echoes
Responses to a fourth dose of Haemophilus influenzae type B conjugate vaccine in early life
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Objective:
To describe the immune response of preterm infants, with a reduced response to primary Haemophilus influenzae type B (Hib) immunisation, to a fourth dose of Hib conjugate vaccine given in early life.
Design:
Prospective observational study.
Setting:
Five Wessex Neonatal Units.
Patients:
Infants born at < 32 weeks and immunised with three doses of combined …