Immunisation levels and the computer.
D002675:Child, Preschool; D003201:Computers; D004165:Diphtheria / Q000517:prevention & control; D004739:England; D006801:Humans; D007115:Immunization Schedule; D008457:Measles / Q000517:prevention & control; D010342:Patient Acceptance of Health Care; D011051:Poliomyelitis / Q000517:prevention & control; D014917:Whooping Cough / Q000517:prevention & control