Changes to national immunisation schedule.
D000368:Aged; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007115:Immunization Schedule; D008875:Middle Aged; D009520:New Zealand; D011054:Poliovirus Vaccine, Inactivated; D013745:Tetanus Toxoid
D011054:Poliovirus Vaccine, Inactivated; D013745:Tetanus Toxoid