Immunity is the body's own defense mechanism, which is the ability of the body to recognize and eliminate any foreign intrusion (viruses, bacteria, etc.) . The immune-compromised body is prone to infection or cancer. Hyperimmunity can also have harmful consequences for the body, such as triggering allergic reactions, autoimmune diseases, etc. Various reasons make the immune system unable to play a protective role normally, in this case, it is very easy to lead to bacterial, viral, fungal and other infections. Therefore, the most direct manifestation of low immunity is easy to get sick. The underlying cause is a weakened immune system or a weak immune system. When the body's immune function is dysfunctional, or the immune system is not healthy, the following problems will recur: recurrent colds, tonsillitis, asthma, bronchitis, pneumonia, and diarrhea. dont underestimate.