Immunogenicity and Safety of DTaP or DT Vaccine in 6 Year Old Children ( DTaP/DT )

Exclusion Criteria

• •1、Being allergic to any component of vaccines ； 2、A history of severe allergic reactions to any vaccine (for example acute allergic reaction, angioneurotic edema, dyspnea, etc）； 3、Having a history or family history of convulsions, encephalopathy, psychosis, uncontrolled epilepsy and other progressive neurological diseases; 4、Participants are suffering from immunodeficiency, receiving immunosuppressant therapy (oral steroid hormones) during treatment for malignancy, or having low immunity due to HIV, or having congenital immune disorders in close family members; 5、Injection of non-specific immunoglobulin within 1 month before enrollment; 6、Participants are suffering from acute febrile diseases and infectious diseases; 7、A history of clearly diagnosed thrombocytopenia or other clotting disorders that may contraindicate subcutaneous injection; 8、Participants with severe chronic diseases or acute episodes of chronic diseases; 9、Participants with infectious, suppurative and allergic skin diseases; 10、Other Participants whose physical conditions, as determined by the investigator, are not suitable for inclusion in clinical studies.