According to Wikipedia : DPT (also DTP and DTwP) is a class of combination vaccines against three infectious diseases in humans: diphtheria, pertussis (whoopin

According to Wikipedia : DPT (also DTP and DTwP) is a class of combination vaccines against three infectious diseases in humans: diphtheria, pertussis (whooping cough), and tetanus. ... The usual course of childhood immunization in the USA is five doses between 2 months and 15 years. For adults, Td boosters are recommended every 10 years. https://en.wikipedia.org/wiki/DPT_vaccine https://en.wikipedia.org/wiki/DPT_vaccine