what are the main functions of the immune system
The main function of the immune system is defense against microbial infection. The other major functions of the immune system depend on a number of major actions that defend us against threats to our health.These actions help our immune system sort out a system of complicated reactions that our body uses every day to defend us from infection and disease.he other major functions of the immune system depend on a number of major actions that defend us against threats to our health. These actions help our immune system sort out a system of complicated reactions that our body uses every day to defend us from infection and disease.