科学家：儿童新冠肺炎症状较轻是因为常得感冒
<p>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。</p><p> <span word="Photo">Photo</span> <span word="by">by</span> <span word="CDC">CDC</span> <span word="on">on</span> <span word="Unsplash">Unsplash</span></p><p><span word="Children">Children</span> <span word="may">may</span> <span word="be">be</span> <span word="protected">protected</span> <span word="from">from</span> <span word="coronavirus">coronavirus</span> <span word="because">because</span> <span word="they">they</span> <span word="catch">catch</span> <span word="so">so</span> <span word="many">many</span> <span word="colds">colds</span>, <span word="scientists">scientists</span> <span word="have">have</span> <span word="suggested">suggested</span>.</p><p>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。</p><p><span word="Figures">Figures</span> <span word="from">from</span> <span word="the">the</span> <span word="Office">Office</span> <span word="for">for</span> <span word="National">National</span> <span word="Statistics">Statistics</span> (<span word="ONS">ONS</span>) <span word="suggest">suggest</span> <span word="children">children</span> <span word="are">are</span> <span word="just">just</span> <span word="as">as</span> <span word="likely">likely</span> <span word="to">to</span> <span word="pick">pick</span> <span word="up">up</span> <span word="the">the</span> <span word="virus">virus</span>, <span word="but">but</span> <span word="few">few</span> <span word="ever">ever</span> <span word="develop">develop</span> <span word="serious">serious</span> <span word="disease">disease</span>, <span word="or">or</span> <span word="even">even</span> <span word="show">show</span> <span word="symptoms">symptoms</span>.</p><p>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。</p><p><span word="Now">Now</span> <span word="scientists">scientists</span> <span word="have">have</span> <span word="suggested">suggested</span> <span word="that">that</span> <span word="children">children</span> <span word="may">may</span> <span word="be">be</span> <span word="resistant">resistant</span> <span word="because">because</span> <span word="their">their</span> <span word="immune">immune</span> <span word="systems">systems</span> <span word="are">are</span> <span word="already">already</span> <span word="well">well</span> <span word="primed">primed</span> <span word="by">by</span> <span word="the">the</span> <span word="common">common</span> <span word="cold">cold</span>.</p><p>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。</p><p><span word="The">The</span> <span word="common">common</span> <span word="cold">cold</span> <span word="is">is</span> <span word="caused">caused</span> <span word="by">by</span> <span word="four">four</span> <span word="different">different</span> <span word="types">types</span> <span word="of">of</span> <span word="coronavirus">coronavirus</span> <span word="which">which</span> <span word="circulate">circulate</span> <span word="in">in</span> <span word="the">the</span> <span word="community">community</span> <span word="and">and</span> <span word="are">are</span> <span word="largely">largely</span> <span word="harmless">harmless</span>. <span word="But">But</span> <span word="while">while</span> <span word="adults">adults</span> <span word="pick">pick</span> <span word="up">up</span> <span word="a">a</span> <span word="cold">cold</span> <span word="around">around</span> <span word="two">two</span> <span word="to">to</span> <span word="four">four</span> <span word="times">times</span> <span word="a">a</span> <span word="year">year</span>, <span word="school">school</span> <span word="age">age</span> <span word="children">children</span> <span word="catch">catch</span> <span word="an">an</span> <span word="average">average</span> <span word="of">of</span> 12 <span word="colds">colds</span> <span word="annually">annually</span>, <span word="studies">studies</span> <span word="have">have</span> <span word="shown">shown</span>.</p><p>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。</p>
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