Vaccines
POLIO
The licensed trivalent Salk IPV used was IMOVAX®-Polio (Sanofi Pasteur, France); each 0.5 mL dose contains 40 D-antigen units of type 1 (Mahoney strain), 8 DU type 2 (MEF-1 strain) and 32 DU type 3 (Saukett strain) polioviruses produced in VERO cells. The bOPV vaccine was Bivalent Polio Sabin™ One and Three produced by GSK (Rixensart, Belgium); each 0.1 mL oral dose contained not less than 10