General principles: balanced diet, various foods, matching thickness, sufficient vegetables and fruits, and limiting salt, sugar and oil. Cooking methods encourage stewing, less frying, and all kinds of food must be cooked when processing. The daily drinking water must be 1600 ml, and it is mainly boiled water and light green tea.

Appropriate supplementation of nutritional supplements (multivitamins and minerals, vitamin C, vitamin AD, calcium and magnesium tablets), human immunity is mainly directly related to the following seven nutrients:

Protein: the basis of antibody formation. Protein-rich foods include milk, eggs, beef, mutton, pork, chicken, duck, fish and shrimp, soybeans and bean products.

Vitamin C: the "catalyst" for antibody formation. Common foods rich in vitamin C are oranges, pears, green peppers, Chinese cabbage and spinach.

Vitamin A: the "patron saint" of the body's first line of defense. Common foods rich in vitamin A are animal liver, carrots, lettuce, leeks, spinach, celery leaves, red peppers, sweet potatoes and so on.

Zinc: a "good helper" to regulate immunity. Common foods rich in zinc are shrimp, scallops, dried mushrooms, beef, horse meat, milk bumps, pumpkin seeds, morels, sunflower seeds and so on.

Iron: the strong backing of antibody formation. Common foods rich in iron include mushrooms, animal livers, duck blood, chicken blood, laver, beef and so on.

Vitamin e: immunomodulator. Common foods rich in vitamin E include sunflower oil, wheat germ, soybean oil and corn.

Selenium: a component of immune cells. Selenium-enriched foods include kidney and liver of animals.

Recommended recipes:

Fried rice with home-cooked eggs:

Nutritional analysis: It is rich in carotene, protein, zinc, iron and dietary fiber.