The old love cold and consider the body immunity decline related, it is recommended that you can through the life of dietary management and drug treatment methods to improve immunity. 1. Life and diet: life suggests that patients usually pay attention to regular work and rest, maintain emotional stability, avoid smoking and alcohol, pay attention to warmth, you can exercise properly, which helps to enhance the body’s physical fitness, enhance the body’s resistance; diet suggests that a balanced diet, you can moderate the intake of fruits and vegetables rich in vitamins and minerals. It is also recommended that more intake of soy products, eggs, dairy products, lean meat, seafood and other protein-rich foods, protein intake helps the synthesis of immune cells, to a certain extent, can enhance the body’s immunity. 2. medication: zinc deficiency is a common cause of immunity decline in infants and children, for zinc-deficient infants and children need to take zinc gluconate and other zinc supplements under the guidance of a doctor to regulate. Adults with decreased immunity are considered to be related to old age or underlying diseases. It is recommended to actively treat underlying diseases according to doctor’s instructions, and use immunomodulators such as thymopeptide for treatment if necessary. If you feel unwell, you should consult a doctor promptly.