初冬天气骤变,人容易受寒,抵抗力减弱,病毒便乘虚而入,侵袭人体的呼吸系统。人也多半在室内活动,又因怕冷经常把窗户关闭,令空气不流通,病毒就更容易通过空气传播。冬春季节是流感的高发时段。而流感高峰期到来之前是适宜接种疫苗的最佳时段。流感作为一种极具传染性的疾病,无 Sudden changes in the weather in early winter, people susceptible to cold, weakened immunity, the virus will take advantage of, invade the body’s respiratory system. Most people are also indoors, and because of the cold often close the window, the air is not circulating, the virus is more easily spread through the air. Spring and winter is a period of high flu. The best time for vaccination is before the flu season. Influenza is a highly contagious disease, nothing