This study is an open and observational phase Ⅳ clinical trial of Sabin Inactivated Poliovirus Vaccine.The purpose of this study is to evaluate the safety of Sabin Inactivated Poliovirus Vaccine (Vero cell)(sIPV)in the primary immunization of infants at the age of 2 months and booster immunization of children at the age of 18 months, and the simultaneous immunization with other vaccines of children at the age of 2 months and older, so as to provide reference for the improvement of immunization strategy.A total of 3200 subjects including 2000 subjects aged 2~3 months in primary immunization group,1200 subjects aged 18 months in primary immunization group will be enrolled and will receive sIPV vaccine or sIPV vaccine and other vaccines simultaneously.
The purpose of this study is to evaluate the safety of Sabin Inactivated Poliovirus Vaccine (Vero cell)(sIPV)in the primary immunization of infants at the age of 2 months and booster immunization of children at the age of 18 months, and the simultaneous immunization with other vaccines of children at the age of 2 months and older, so as to provide reference for the improvement of immunization strategy.