A Clinical Trial to Evaluate the Immunogenicity and Safety of sIPV in a '1+2' Sequential Schedule With bOPV in Infants

Single intramuscular injection of the experimental sIPV (0.5 ml) on Day 0, following two doses of bOPV (0.1 ml) on Day 30 and Day 60 respectively. The investigational Sabin strain inactivated poliovirus vaccine (Vero cell)(sIPV) was manufactured by Sinovac Vaccine Technology Co., Ltd. The poliovirus (Live) vaccine type I \& type III (Human Dipoid cell) ( bOPV) was manufactured by Beijing Bio-institute Biological Products Co., Ltd.

Single intramuscular injection of the control wIPV (0.5 ml) on Day 0, following two doses of bOPV (0.1 ml) on Day 30 and Day 60 respectively.The control wild strain inactivated poliovirus vaccine (wIPV) was manufactured by SANOFI PASTEUR S.A. The poliovirus (Live) vaccine type I \& type III (Human Dipoid cell) ( bOPV) was manufactured by Beijing Bio-institute Biological Products Co., Ltd.