How to protect the respiratory tract in winter The winter temperature is low, generally windy, dry air, this climate is more damaging to the respiratory tract, making people vulnerable to colds, bronchitis, pneumonia and other respiratory diseases. Winter protection of the respiratory tract should start from the following aspects: 1, avoid being cold. When the body is cold, the respiratory tract vasoconstriction, blood supply is reduced, local resistance is reduced, the virus is easy to invade. Therefore, the focus of winter protection of the respiratory tract is to pay attention to the cold to keep warm. 2, purify the indoor air. The human respiratory tract is the place where the air must pass through, the air is most likely to cause respiratory diseases, so pay attention to keep the indoor air fresh. When there is enough sunshine, let the sunlight into the room as much as possible, because the ultraviolet ray in the sunlight has the effect of sterilization; vinegar can also be used to fumigate the room to disinfect. 3.Supplement nutrition. Eat more fish, meat, eggs, milk and other protein-rich food to enhance the body’s immune function; eat more fresh vegetables and fruits rich in vitamin C, which can neutralize toxins in the body and improve the ability to resist disease. Winter climate is dry, the air dust content is high, the human nasal mucosa is easily damaged, pay attention to drink more water, so that the nasal mucosa to keep moist, can effectively resist the invasion of viruses, but also conducive to the excretion of toxins in the body, to purify the internal environment. 4, pay attention to personal hygiene and personal protection. Be careful to wash your hands and rinse your mouth, do not touch your face, eyes, mouth and other parts with dirty hands; go out to stand in a place with good air circulation as much as possible, and go to crowded public places as little as possible; wear a mask when going out on foggy and windy days.