美国卫生专家：追踪接触者是抗疫最强大武器
<p>新冠肺炎疫情暴发以来，追踪接触者成为阻止病毒传播的最有力武器。一些国家推出新冠病毒接触者追踪<span word="app">app</span>，还有一些国家培训并雇用了接触者追踪员，减缓了病毒的传播，为抗击疫情争取了时间。</p><p> <span word="Holiday">Holiday</span> <span word="beachgoers">beachgoers</span> <span word="head">head</span> <span word="to">to</span> <span word="Venice">Venice</span> <span word="Beach">Beach</span> <span word="on">on</span> <span word="Memorial">Memorial</span> <span word="Day">Day</span> <span word="as">as</span> <span word="coronavirus">coronavirus</span> <span word="safety">safety</span> <span word="restrictions">restrictions</span> <span word="continue">continue</span> <span word="being">being</span> <span word="relaxed">relaxed</span> <span word="in">in</span> <span word="Los">Los</span> <span word="Angeles">Angeles</span> <span word="County">County</span> <span word="and">and</span> <span word="nationwide">nationwide</span> <span word="in">in</span> <span word="Los">Los</span> <span word="Angeles">Angeles</span>, <span word="California">California</span>, <span word="on">on</span> <span word="May">May</span> 24, 2020. [<span word="Photo">Photo</span>/<span word="Agencies">Agencies</span>]</p><p><span word="Whenever">Whenever</span> <span word="a">a</span> <span word="new">new</span> <span word="infectious">infectious</span> <span word="disease">disease</span> <span word="emerges">emerges</span>, <span word="contact">contact</span> <span word="tracing">tracing</span> <span word="is">is</span> <span word="public">public</span> <span word="health">health</span>’<span word="s">s</span> <span word="most">most</span> <span word="powerful">powerful</span> <span word="weapon">weapon</span> <span word="for">for</span> <span word="tracking">tracking</span> <span word="transmission">transmission</span> <span word="and">and</span> <span word="figuring">figuring</span> <span word="out">out</span> <span word="how">how</span> <span word="best">best</span> <span word="to">to</span> <span word="protect">protect</span> <span word="the">the</span> <span word="population">population</span>.</p><p>每当一种新传染病出现时，公共卫生部门就需要追踪传播路径并确定保护国民的最佳方案，而追踪接触者就是其最强大的武器。</p><p><span word="But">But</span> <span word="now">now</span>, <span word="as">as</span> <span word="coronavirus">coronavirus</span> <span word="cases">cases</span> <span word="are">are</span> <span word="surging">surging</span> <span word="in">in</span> <span word="hot">hot</span> <span word="spots">spots</span> <span word="across">across</span> <span word="the">the</span> <span word="United">United</span> <span word="States">States</span>, <span word="the">the</span> <span word="proven">proven</span> <span word="strategy">strategy</span>’<span word="s">s</span> <span word="effectiveness">effectiveness</span> <span word="is">is</span> <span word="in">in</span> <span word="doubt">doubt</span>: <span word="Contact">Contact</span> <span word="tracing">tracing</span> <span word="failed">failed</span> <span word="to">to</span> <span word="stanch">stanch</span> <span word="the">the</span> <span word="first">first</span> <span word="wave">wave</span> <span word="of">of</span> <span word="coronavirus">coronavirus</span> <span word="infections">infections</span>, <span word="and">and</span> <span word="today">today</span>’<span word="s">s</span> <span word="far">far</span> <span word="more">more</span> <span word="extensive">extensive</span> <span word="undertaking">undertaking</span> <span word="will">will</span> <span word="require">require</span> 100,000 <span word="or">or</span> <span word="more">more</span> <span word="trained">trained</span> <span word="tracers">tracers</span> <span word="to">to</span> <span word="delve">delve</span> <span word="into">into</span> <span word="strangers">strangers</span>’ <span word="personal">personal</span> <span word="lives">lives</span> <span word="and">and</span> <span word="persuade">persuade</span> <span word="even">even</span> <span word="some">some</span> <span word="without">without</span> <span word="symptoms">symptoms</span> <span word="to">to</span> <span word="stay">stay</span> <span word="home">home</span>.</p><p>现在，随着新冠肺炎病例在美国各热点地区大幅增加，这项历经考验的策略的有效性却受到质疑：它没能遏制第一波病毒传染，而且今天这项工作的规模过于庞大，需要至少10万名训练有素的追踪员，探究陌生人的个人生活，甚至劝说一些没有症状的人呆在家里。</p>
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