1. Eat foods rich in protein and vitamins, such as. Carrots, broccoli, spinach, pork liver, milk, eggs, beef, mutton, fish, etc.

2. Eat foods rich in minerals, such as. Trace elements such as calcium, iron and zinc.

3. Drink water and inject immunoglobulin, flu vaccine and other ways to improve the body's metabolic capacity.

4. Use Chinese patent medicines that enhance immunity, such as. Compound glue paste, Buzhong Yiqi Granule and other drugs to improve immunity.