Definition: The branch of medicine that concerns the body's immune system.

Alright class, settle in and let’s take a peek, At a fascinating subject – Immunology, unique! Now, you read the dictionary, quite true, It tells us it’s about “the body’s immune crew.” Let's break that down with a little rhyme, To help you grasp this concept in good time. Immunology means studying how our bodies fight, Against invaders – germs both dark and bright! It’s the science of defenses, strong and bold, Protecting us from sickness, stories told. Think of it like an army, brave and keen, Working tirelessly, a healthy scene! They recognize threats, they learn to defend, And build up shields until the very end. So, remember this: Immunology’s the key, To understanding how our bodies truly see – And battle back against illness, you agree? Do you have any questions about this concept we've seen?