The human immune system is a more complicated system than the computer network. It is a multi-level biological defense system, whose main purpose is to protect the body from bacteria, viruses, fungi, parasites, toxins, cancer cells and other pathogenic substances. Our bodies are protected by layers of immune defense system, which makes us live a healthy life. Once the immune system is destroyed, or the internal disorder occurs, you may get a serious disease as a result. There are many things in life that will damage the immune system, such as genetic defects, drugs and diseases, and people's immunity will also decline with age. Strengthening nutrition, taking or injecting drugs that enhance immunity properly can enhance people's ability to prevent and resist diseases.

Strengthen exercise