Singapore legislation
Clause 6
Clause 6
Booster diphtheria inoculation
Upon the coming into operation of this Ordinance, booster diphtheria inoculation shall be compulsory for every child residing in Singapore who has received primary diphtheria inoculation —
upon such child attaining the age of four years:Provided that an interval of three years has elapsed since the administration to such child of primary diphtheria inoculation, but if such interval does not exceed three years and the child has passed the age of four years and has not attained the age of six years, booster diphtheria inoculation may be administered between the period of thirty-six to forty-two months of the primary diphtheria inoculation; and
upon such child entering a primary school, within twelve months of entering such school.