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对新冠疫情的监测发现，儿童的发病率较低，症状也较轻。这是为什么呢？科学家认为，这可能是因为儿童经常得感冒，免疫系统已经做好了充分准备。 Photo by CDC on Unsplash Children may be protected from coronavirus because they catch so many colds, scientists have suggested. 科学家指出，儿童经常感冒可能会保护他们免受新冠病毒的伤害。 Figures from the Office for National Statistics (ONS) suggest children are just as likely to pick up the virus, but few ever develop serious disease, or even show symptoms. 英国国家统计局的数据显示，儿童和大人一样容易感染新冠病毒，但是发展成重症的儿童没有多少，有些甚至没有表现出症状。 Now scientists have suggested that children may be resistant because their immune systems are already well primed by the common cold. 现在科学家指出，儿童对新冠病毒可能有抵抗力，因为普通感冒已经让他们的免疫系统做好了充分准备。 The common cold is caused by four different types of coronavirus which circulate in the community and are largely harmless. But while adults pick up a cold around two to four times a year, school age children catch an average of 12 colds annually, studies have shown. 普通感冒是由社区中流行的四种不同的冠状病毒引起的，大部分都是无害的。但是研究显示，成年人每年大约感冒两到四次，学龄儿童每年平均感冒12次。 | 
