title: China's expanded program on immunization.
authors.affiliation: Department of Epidemic Prevention, Ministry of Public Health, P. R. China, Beijing.
authors.forename: Z
authors.initials: Z
authors.lastname: Wang
authors.forename: B P
authors.initials: BP
authors.lastname: Yang
mesh_terms: D001500:BCG Vaccine; D002675:Child, Preschool; D002681:China; D015721:Diphtheria-Tetanus-Pertussis Vaccine; D006801:Humans; D007114:Immunization / Q000639:trends*; D007115:Immunization Schedule; D007223:Infant; D008458:Measles Vaccine; D011055:Poliovirus Vaccine, Oral
chemical_list: D001500:BCG Vaccine; D015721:Diphtheria-Tetanus-Pertussis Vaccine; D008458:Measles Vaccine; D011055:Poliovirus Vaccine, Oral