A booster dose of diphtheria-containing vaccine is recommended for adolescents, using the reduced antigen dTpa vaccine. The optimal age for administering this dose is 11–13 years.
Adolescents need a booster dose of diphtheria-containing vaccine to extend the protective level of diphtheria immunity to adulthood.1 The booster is also essential for maintaining immunity to tetanus and pertussis into adulthood.1
