Safety Study of S.Flexneriza-S.Sonnei Bivalent Conjugate Vaccine in Healthy Volunteers Aged Above 3 Months

Inclusion Criteria: * 3 months old and above healthy people. * Subject or legal representative who consent and has signed written informed consent. * Subject and parent/guardian who is able to comply with all study procedures. * Subject who did't receive blood products within 30 days ,immune with any live vaccine within 14 days and inactivated vaccine within 7 days before vaccination. * Axillary temperature ≤37.0 ℃. Exclusion Criteria: * Febrile illness (temperature ≥ 38°C) in the 3 days. * Subject who are allergic to tetanus toxoid. * Allergic history after vaccination. * Immunodeficiency diseases patients who administered with immunosuppressive agents. * In pregnancy or lactation or pregnant women. * Subject who are suffering from serious chronic diseases, infectious diseases, active infection, cardiovascular disease,liver or kidney disease. * Subject who have symptoms such as diarrhea, abdominal pain, and pus and bloody stools in the past 3 days. * History of allergy，eclampsia, epilepsy,brain trauma,encephalopathy and mental disease or family disease. * Subject who diagnosis of thrombocytopenia or other history of coagulopathy may cause intramuscular contraindication. * Children with abnormal labor（pregnancy week\<37w,\>42w）,birth weight (\<2500g,\>4000g), asphyxia rescue history,congenital malformations or developmental disorders(Only applicable to 3-5 months old group) * Blood routine, blood chemistry and urinalysis laboratory collection abnormalities and the severity of grade 2 and above before immunization. * Subject who plan to participate in or is in any other drug clinical trial. * Any condition that, in the judgment of investigator, may affect trial assessment.