感冒是一种极为常见的疾病,虽然它一般不致造成大的危险,但却会给患者带来诸多痛苦。多年来,研究人员一直在致力于对这种疾病的研究。他们发现,感冒可由200多种病毒中的任何一种引起,这些病毒极为微小,如果把鼻咽细胞放大到房子那么大的话,与其相比、感冒病毒也许只有它的窗户大小。研究人员还建造出了据认为会引起大部分感冒的病毒模型,他们 Colds are a very common disease that, although generally not cause great danger, can cause pain to patients. For years, researchers have been working on the research of this disease. They found that a cold can be caused by any of more than 200 viruses that are extremely small. Compared to that, the virus may have only its window size if the nasopharyngeal cells are enlarged as large as a house. Researchers have also built virus models that they think will cause most of the flu