👉 Postdiphtherial is a term used in medicine to describe an infection that occurs during vaccination. This can occur after a child has received their first dose of diphtheria, tetanus, and pertussis (DTP) vaccine, which typically protects against the three diseases. The term "postdiphtherial" refers to the period following the initial injection when the immune system is still developing its response to these vaccines. The infection can be severe if not treated promptly, as