Vicent RodillaValencia, Spain Diphtheria is a bacterial infectious disease caused by Corynebacterium diphtheriae that affects mostly children. Although by 2017 some 85% of infants worldwide have been vaccinated for DTP (diphtheria-tetanus-pertussis), some 19.9 million children remain unvaccinated.1 According to the World Health Organization, reported cases of diphtheria have decreased from nearly 100,000 in 1980 to…