Immunity is the body’s ability to identify and destroy foreign viruses and resist disease. To quickly improve the body’s immunity can be improved in the following ways: 1. Exercise, exercise can improve the body’s metabolism, accelerate blood circulation, sunlight can also enhance the synthesis of vitamin D in the body, prompting the body to improve immunity. 2. The immunity of the human body may be low due to the lack of certain minerals or trace elements in the body, so it is necessary to supplement protein and trace elements required by the human body, in addition to ensuring sufficient sleep and rest time and reducing psychological stress, which will help the human body to improve immunity.