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What's the Immune System?

en español

Sistema inmunitario

Immune System

Say: ih-MYOONSIS-tum

Your immune system, which includes white blood cells and lymph nodes, helps protect your body from disease. It has different parts, all of which work together to fight off outside invaders like germs. Every day your immune system does battle to keep you healthy and feeling your best.

A KidsHealth Education Partner Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.

Images sourced by The Nemours Foundation and Getty Images.