First of all, it must be clear that most authorities and experts agree that vaccination against influenza A is the most effective measure to prevent influenza A (I am also the first medical staff to be vaccinated against influenza A). In addition, frequent hand washing, more ventilation, attention to warmth, and fewer places with more people are also recommended as effective prevention strategies. In contrast, the preventive effect of diet on H1N1 influenza is limited, mainly from the perspective of a balanced diet and adequate nutrition to improve human immunity.

　　 The basic premise is to ensure a balanced diet, diversified food varieties, grains, beans, fish, eggs, milk and animals, as well as vegetables and fruits. Don''t be greasy, but don''t be too light. On the basis of a balanced diet and reasonable nutrition, you should pay attention to a few key issues:

　　 1. There should be sufficient animal food in the recipe, such as milk (300g per day), eggs (1 per day) ), fish and shrimp (50g per day), lean meat (50g per day), soybeans (equivalent to 30-50g dry soybeans per day). They are not only a good source of high-quality protein, but also provide abundant vitamin A, B group and iron, zinc and other trace elements. High-quality protein is the basis of good immunity. Vitamin A and the lack of trace elements such as iron and zinc are common causes of low immunity. So these foods are the backbone of the fight against flu, and they cannot be abandoned in pursuit of a light diet. Of course, we must pay attention to choose less fat-containing varieties, such as low-fat milk, egg whites, lean meat, soy products, etc., to avoid excessive intake of fat.

　　 2. Fresh vegetables (especially green or red-yellow-colored vegetables) and fruits are rich in vitamin C and various antioxidants, which play an important role in improving human immunity. It is recommended to consume 1 kg of vegetables per day, and most of them should be dark fresh vegetables. The fruit is half a catty a day. When the intake of vegetables and fruits does not reach the recommended level, vitamin C or multivitamin mineral supplements should be taken orally.

　　 3. Onion garlic foods, such as garlic, ginger, green onions, onions (green onions), etc., have strong antibacterial and antiviral effects. It can be eaten directly as a vegetable or as a condiment for three meals a day. Generally speaking, raw garlic, ginger, green onions, onions, etc. are better. It is also good to eat after being cooked or roasted.

　　 4. Mushrooms such as shiitake mushrooms and agaric contain special types of polysaccharides, which have been shown to improve immunity. Stir-fry, stew or soup is a good way to obtain fungal polysaccharides.

　　 5. Drinking tea, whether it is green tea, black tea or special Pu''er, is beneficial to enhance immunity. It is best to continue drinking tea in small quantities.

　　 6. Ensure adequate drinking water, because a good "hydration" of the body helps to improve various functions of the body, including resistance to viruses. Like fatigue, lack of water also increases the chance of viral infection. The weather is getting colder and the amount of drinking water is generally reduced, but it should be guaranteed to urinate at least 4 times a day (24 hours).

　　 7. Red wine is also often recommended for anti-virus, but it is only suitable for non-drinking, and wins less. Drunk or greedy, no matter what kind of alcohol, will seriously damage the body''s immunity and increase the chance of catching a cold or flu.

　　 8. Although there are many controversies about its effectiveness, taking a large dose (400 to 800 mg per day) of vitamin C during flu is still one of the feasible preventive measures. However, this suggestion is a personal opinion and is for reference only. Most authoritative organizations have not given the same recommendation.

　　 9. When the “Prevention Program for Influenza A (H1N1) Chinese Medicine (2009 Edition)” issued by the State Administration of Traditional Chinese Medicine in May this year mentioned dietary prevention, it advocated the use of mint, mulberry leaves, chrysanthemum, houttuynia cordata, Purslane, sapodilla, mung bean, red bean, spring onion, ginger, etc. are used to make medicinal meals. These medicinal diets seem more suitable for summer.

　　 The title of this article is ten countermeasures, but the serial number in the article only lists nine. This is because before these nine, one of them is the foundation, the major premise, and the most important, that is, the balanced diet. Leaving this basic principle, other dietary recommendations are almost worthless.