The main purpose of this study is to evaluate immune persistence at 30 and 36 Months of Age and Pertussis Breakthrough Infections between 19 and 36 Months of Age following two regiments of DTaP-IPV/Hib Pentavalent Vaccine in Healthy 2-Month-Old Infants and Children in China.
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Anti-pertussis toxin, anti-pertussis filamentous hemagglutinin, anti-pertussis adhesin, anti-pertussis FIM2, anti-pertussis FIM3 .Anti-diphtheria, anti-tetanus, anti-HIB PRP and anti-type 1, 2 and 3 poliomyelitis antibody levels .
Timeframe: 30 months of age
Anti-pertussis toxin, anti-pertussis filamentous hemagglutinin, anti-pertussis adhesin, anti-pertussis FIM2, anti-pertussis FIM3 .Anti-diphtheria, anti-tetanus, anti-HIB PRP and anti-type 1, 2 and 3 poliomyelitis antibody levels .
Timeframe: 36 months of age