感冒是一种呼吸道传染病 ,感冒又分普通感冒(俗称伤风 )和流行性感冒 (简称流感 )。当一个人抵抗力下降时就容易受到病菌侵害 ,比如受凉、过度劳累等 ,常是感冒的诱因。感冒的预防主要是加强锻炼 ,注意防寒保暖 ,保持清洁卫生 ,必要时可注射流感疫苗等。虽然注射流感疫苗可使人 Cold is a respiratory disease, the common cold is divided into cold (commonly known as cold) and influenza (referred to as flu). When a person’s resistance drops easily vulnerable to bacteria, such as cold, over-exertion, etc., is often a trigger for a cold. Cold prevention is mainly to strengthen the exercise, pay attention to cold warm, keep clean, if necessary, can be injected flu vaccine. Although flu vaccination can make people