Influenza, commonly called "the flu," is caused by a virus that infects the respiratory tract.
The incubation period for flu is about one to four days, flu is contagious and symptoms may last as long as seven to 14 days.
Influenza spreads rapidly and can cause seasonal epidemics every year. In schools, nursing homes and other places where people gather and have poor resistance, it often causes large-scale transmission.
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A global study showed an infection rate of 10.7% among adults, a prevalence rate of 4.4%, and 7.2% of those over 65
According to the estimates of the World Health Organization (WHO), seasonal influenza can cause 3 to 5 million severe cases and 290,000 to 650,000 deaths worldwide each year.
All children under the age of 5 are considered at high risk of severe influenza. High-risk groups such as pregnant women, infants, the elderly, and patients with chronic underlying diseases have a higher risk of severe illness and death after contracting influenza.
In April 2009, a new strain of influenza called novel H1N1 swine flu emerged in Mexico, rapidly spreading around the world and leading the World Health Organization to declare an influenza pandemic. Finally, the World Health Organization declared the pandemic over in 2010. A novel influenza strain, H3N2v, emerged in 2012 but has not yet developed into a pandemic.
Wearing a mask to stay away from the crowd during the peak period of influenza, improving one's own body resistance and eating some foods scientifically are also particularly effective.
(1) Eat more protein-rich foods: The main substance of the human immune system is immunoglobulin. When the human body lacks protein, the number of lymphocytes in immune cells will be greatly reduced, and the synthesis of immune substances will be insufficient, resulting in a serious decline in immune function. Protein is mainly obtained from animal foods, such as beef, skinless chicken breast, egg white, milk, shrimp, etc.
(2) Eat more foods containing zinc: Zinc-rich foods can activate more than 200 kinds of hormones and enzymes that are important to life, and help the immune system to exert its greatest protective effect. Zinc deficiency will reduce the level of immunoglobulin in the body, weaken the body's defense ability, and increase the chance of various epidemic diseases including influenza. Zinc-rich foods mainly include oysters, crabs, beans, beef, mutton, dried fish, scallops, pork liver, wheat germ, etc.
(3) Vitamin supplementation: Vitamin A can maintain the stability of respiratory mucosal epithelial cells. Vitamin C and vitamin E are antioxidants naturally present in food, which can scavenge free radicals that are harmful to our body and enhance the body's resistance. The B vitamins participate in the energy metabolism in the body, promote protein synthesis, and play a very important role in the normal maintenance of physiological functions. These vitamins are found in large quantities in vegetables, fruits, grains, beans and other foods.
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