Immune system Definition & Meaning - Merriam-Webster

What Causes a Weak Immune System? immune system Innate immune system · recruit immune cells to infection sites by producing chemical factors, including chemical mediators called cytokines · activate the excretory system COVID-19 vaccines If you have a weakened immune system due to a health condition or medical treatment, and you are aged 6 months or over, you

system789 The immune system protects your child's body from outside invaders These include germs such as bacteria, viruses, and fungi, and toxins (chemicals made by