Background: Vaccination is still one of the most important methods to control and prevent childhood infections\nincluding diphtheria and pertussis. This study evaluated the level of diphtheria (DT) and pertussis (PT)-related\nantibodies among children with pneumonia in Jiâ??nan, China.\nMethods: A total of 484 sera of children from 1 day to 13 years of age were collected from 2014 to 2015 in Jiâ??nan.\nChildren with recent history of pertussis were excluded from this study. Anti-DT and PT IgG concentrations were\nmeasured by ELISA (Euroimmun, Lübeck, Germany).
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