In 1994 triple antigen vaccine (DTP) was introduced into the vaccination schedule for children age 4-5 years.
Fasher
A M
AM
Dunbar
N
N
Young
S
S
D000367:Age Factors; D002675:Child, Preschool; D015721:Diphtheria-Tetanus-Pertussis Vaccine / Q000008:administration & dosage / Q000009:adverse effects*; D006801:Humans; D007115:Immunization Schedule; D015994:Incidence; D007223:Infant; D017060:Patient Satisfaction; D015397:Program Evaluation; D011446:Prospective Studies
D015721:Diphtheria-Tetanus-Pertussis Vaccine