Streptococcus Pneumoniae Infection Clinical Trial
Official title:
Phase III Clinical Trial to Evaluate the Immunogenicity and Safety of 13-valent Pneumococcal Conjugate Vaccine (Multivalent Conjugate) in Infants Aged 2 Months (at Least 6 Weeks) and 3 Months
This study is a phase III clinical trial to evaluate the immunogenicity and safety of the 13-valent pneumococcal conjugate vaccine (multivalent conjugate) in infants aged 2 months (at least 6 weeks) and 3 months. The main objectives of the study include: 1. To evaluate the immunogenicity of the trial vaccine in infants aged 2 months (at least 6 weeks) following the corresponding immunization schedule compared to the control vaccine; 2. To evaluate the immunogenicity of the trial vaccine in infants aged 3 months following the corresponding immunization schedule compared to the 2-month group; 3. To evaluate the safety of the trial vaccine in infants aged 2 months (at least 6 weeks) and 3 months following the corresponding immunization schedule.
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