6 weeks 2nd dose 6-12 months after the second dose Given to children with contraindication to pertussis vaccine. Upper age limit usually 6 years. Usually 6 weeks 2nd dose 6-12 months after the second dose Additional booster doses every 10 years. Indicated for persons travelling to epidemic areas. In endemic countries, an additional dose is given at birth or at 9 months.
Some countries also give booster doses before or at school age.
Infants travelling should receive 4 doses of OPV prior to departure. In some countries booster doses are given before or at school age. 10 years Preventive immunoglobulin therapy is effective though of limited duration and hepatitis A vaccine is preferred when available. Indicated for travel to developing countries. None May be given at birth.