What is the immune system?
Last reviewed Fri 17 November 2017
By Tim Newman
Reviewed by Daniel Murrell, MD
Our immune system is essential for our survival. Without an immune system, our bodies would be open to attack from bacteria, viruses, parasites, and more. It is our immune system that keeps us healthy as we drift through a sea of pathogens.
This vast network of cells and tissues is constantly on the lookout for invaders, and once an enemy is spotted, a complex attack is mounted.
https://www.medicalnewstoday.com/articles/320101.php
