A recent paper published in the journal Clinical Infectious Diseases suggested that tetanus and diphtheria booster vaccines are not necessary for adults who have completed their childhood vaccination series. This advice aligns with the current World Health Organization (WHO) The conclusion aligns with the World Health Organization's recent recommendations to only routinely give adults tetanus and diphtheria vaccines if they didn't receive a full series of shots as children. Adults do not need tetanus or diphtheria booster shots if they've already completed their childhood vaccination series against these rare, but debilitating diseases, according to research published in the journal Clinical Infectious Diseases..