1. Fruits and vegetables: Fruits and vegetables are rich in nutrients such as vitamin C, vitamin A and folic acid, which can enhance the immune system. It is recommended to eat more dark vegetables and fruits, such as spinach, tomatoes, red, orange and yellow fruits.
2. Nuts and seeds: Nuts and seeds are rich in healthy fat, protein, vitamin E and other nutrients, which help to resist inflammation and enhance immunity. It is recommended to eat more almonds, walnuts and sunflower seeds.
3. Fish: Fish is rich in protein and Omega-3 fatty acids, which can reduce inflammatory reaction and enhance the function of immune system. It is recommended to eat more salmon, cod and tuna.
4. Condiments such as ginger, garlic and onion: These condiments are rich in natural antibiotics and antioxidants, which can increase the body's resistance to viruses and bacteria. It is recommended to eat more ginger, garlic and onions.
5. Green tea: Green tea is rich in antioxidants and tea polyphenols, which can enhance immunity and resist viral and bacterial infections. It is recommended to drink 2-3 cups of green tea every day.
It should be noted that although food helps to improve immunity, it cannot completely prevent infection. During the flu season, you should also maintain good personal hygiene habits, such as washing your hands frequently, avoiding crowds and wearing masks to reduce the risk of infection. At the same time, if you have flu symptoms, you should seek medical advice as soon as possible and receive appropriate treatment.