An Immunogenicity and Safety Study of Sabin Inactivated Poliovirus Vaccine (Vero Cell) in 2-month-old Infants

Inclusion Criteria: * Healthy volunteer between 60-90 days old; * Healthy volunteers who fulfill all the required conditions for receiving the investigational vaccine as established by medical history and clinical examination and determined by investigators; * Proven legal identity; * Participants or guardians of the participants should be capable of understanding the written consent form, and such form should be signed prior to enrolment; * Complying with the requirement of the study protocol; Exclusion Criteria: * Prior vaccination with Poliovirus Vaccine; * History of allergy to any vaccine, or any ingredient of the vaccine, or serious adverse reaction(s) to vaccination, such as urticaria, dyspnea, angioneurotic edema, abdominal pain, etc; * Congenital malformation, developmental disorders, genetic defects, or severe malnutrition; * Autoimmune disease or immunodeficiency/immunosuppressive; * Severe nervous system disease (epilepsy, seizures or convulsions) or mental illness; * Diagnosed coagulation function abnormal (e.g., coagulation factor deficiency, coagulation disorder, or platelet abnormalities) , or obvious bruising or coagulation disorders; * Any immunosuppressant, cytotoxic medicine, or inhaled corticosteroids (except corticosteroid spray for treatment of allergic rhinitis or corticosteroid treatment on surface for acute non-complicated dermatitis) prior to study entry; * Blood product prior to study entry; * Any other investigational medicine(s) within 30 days prior to study entry; * Any live attenuated vaccine within 14 days prior to study entry; * Any subunit vaccine or inactivated vaccine within 7 days prior to study entry; * Acute disease or acute stage of chronic disease within 7 days prior to study entry; * Axillary temperature \> 37.0 °C; * Any other factor that suggesting the volunteer is unsuitable for this study based on the opinions of investigators;