Science

Take a tour of your virus-fighting immune system

Millions of cells, protecting you

by JoAnna Wendel
Updated: 
Originally Published: 
Antibody and Virus - visual concept of immune System - 3D illustration
Shutterstock

Shutterstock

The immune system has several lines of defense against life-threatening infections.

Shutterstock

Immunity starts at your skin, your body’s largest organ. Human skin contains a type of immune cell called a T-lymphocyte, or T-cell for short.

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