An Immunity Persistence Study of Sabin Inactivated Poliovirus Vaccine(Vero Cell) After Four Doses

Condition:   Poliomyelitis Interventions:   Biological: Investigational sIPV;   Biological: Control IPV Sponsor:   Sinovac Biotech Co., Ltd Not yet recruiting
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials