1, banana. Banana contains alkaloids, which can cheer people up and is an important source of calcium pantothenate and tryptophan. Eating bananas regularly can enhance immunity.

2. Deep-water fish plays a great role in enhancing immunity. Deep-water fish contain w3 fatty acids, which can enhance human immunity.

3. Spinach in vegetables is rich in iron folic acid, which can enhance immunity.

4, garlic, low-fat milk, can enhance immunity, and propolis is a natural immune enhancer, which can enhance the ability of phagocytes to phagocytize bacteria and viruses.