What is the purpose of the immune system?

Step-by-step solution

This could be because of the protected environment provided early in life.The immune system is designed to recognize and respond to foreign antigens, not to attack self-cells. Higher vertebrates can distinguish foreign molecules as well as foreign organisms, which is the basis for most experimental immunology. Auto-immune disease occurs when the body attacks self-cells, resulting in damage to the body The immune system is designed to recognize and respond to foreign antigens, not to attack self-cells. Higher verteb