Immunisation against diphtheria, tetanus, pertussis and polio.
D002675:Child, Preschool; D004165:Diphtheria / Q000517:prevention & control*; D006801:Humans; D011051:Poliomyelitis / Q000517:prevention & control*; D013742:Tetanus / Q000517:prevention & control*; D006113:United Kingdom; D014611:Vaccination; D014917:Whooping Cough / Q000517:prevention & control*