春季冷热多变,而且昼夜温差大、早晚温差大。身体虚弱的人体温调节能力差,如果没有及时增减衣服,容易感冒。忽冷忽热天气多变的春季是上呼吸道感染常见与多发的季节,尤其是老年人、小孩等免疫功能较差的人群更易发病。流感病毒最重要的传播途径是空气飞沫,也可以通过被病毒污染的手帕或衣物等传播,这与以下四个因素有关:室内活动多,空气不新鲜,易导致呼吸道传染病流行。冬春季节气温较低,人 Hot and cold in spring, and the temperature difference between day and night, big temperature difference between morning and evening. Poor body temperature regulation ability, if not change clothes in time, easy to catch cold. Cold and hot The spring is changing the common and frequent upper respiratory tract infection season, especially the elderly, children and other immunocompromised groups are more susceptible to disease. The most important route of transmission of influenza virus is air droplets, which can also be transmitted through virus-contaminated handkerchiefs or clothing, which is related to the following four factors: indoor activities and fresh air can easily lead to the epidemic of respiratory infectious diseases. Winter and spring temperatures are low, people