Immunogenicity and Safety Evaluation of Different Sequential Immunization Strategies by Sabin IPV and bOPV in Chinese Infants

Immunogenicity and Safety Evaluation of Different Sequential Immunization Strategies by Sabin IPV and bOPV in Chinese Infants

The purpose of this study is to evaluate the immunogenicity and safety of different sequential immunization strategies by Sabin IPV and bOPV in Chinese infants.

Inclusion Criteria:

• Parent/legal acceptable representative is willing and able to understand the protocol requirements and provide informed consent.
• Participant is aged ≥ 60 days to ≤ 75 days.
• Participant without preventive inoculation of polio vaccine and previous history of Polio.
• Subject and parent/guardian able to attend all scheduled visits and comply with all trial procedures.
• Body temperature ≤ 37.5℃.

Exclusion Criteria:

• Known allergy to any constituent of the vaccine.
• Known acute illness, severe chronic disease, acute exacerbation of chronic disease and fever.
• Known or suspected impairment of immunologic function, or receipt of immunosuppressive therapy or immunoglobulin since birth.
• Reported the history of allergies, convulsions, epilepsy, mental illness and brain disease and clear serious systemic reaction.
• Known bleeding disorder.
• Receipt of the whole blood, blood plasma or immunoglobulin before the trial vaccination.
• Reported the history of acute illness had need systemic antibiotics or antiviral treatment of infections in the 7 days preceding the trial vaccination.
• An acute illness with or without fever (temperature ≥ 38.0℃) in the 3 days preceding enrollment in the trial.
• Participation in any other intervention clinical trial.
• Any condition which, in the opinion of the investigator, would pose a health risk to the subject or interfere with the vaccine.