Safety and Immunogenicity Study of a 13-valent Pneumococcal Polysaccharide Conjugate Vaccine

Inclusion Criteria: * Healthy infants aged 2 months (minimum 6 weeks), healthy infants aged 3 months, healthy infants aged 7 \~ 11 months, healthy infants aged 12\~ 23 months, healthy children aged 2\~ 5 years, healthy adolescent and children aged 6\~ 17 years, healthy adults aged 18\~ 49 years； * Proven legal identification and vaccination certificate (vaccination certificate is required for those aged 5 and below)； * The subject and/or guardian can understand and voluntarily sign the informed consent form. Exclusion Criteria: * Have received pneumococcal polysaccharide vaccine or pneumococcal polysaccharide conjugate vaccine; * Have Bacterial pneumonia or invasive pneumococcal infectious disease (IPD) caused by pneumococcus confirmed by sputum culture; * History of asthma, history of allergy to the vaccine or vaccine components, or serious adverse reactions to the vaccine, such as urticaria, dyspnea, and angioedema; * Congenital malformations or developmental disorders, genetic defects, severe malnutrition, etc.; * Autoimmune disease or immunodeficiency / immunosuppression; * Severe chronic diseases, severe cardiovascular diseases, hypertension and diabetes that cannot be controlled by drugs, liver or kidney diseases, malignant tumors, etc.; * Severe neurological disease (epilepsy, convulsions or convulsions) or mental illness; * History of thyroidectomy, absence of spleen, functional absence of spleen, and absence of spleen or splenectomy due to any circumstance; * Diag…