美国疾控中心修改新冠密切接触者的定义-凯发k8官网

federal health officials issued new guidance on wednesday that greatly expands the pool of people considered at risk of contracting the novel coronavirus by changing the definition of who is a "close contact" of an infected individual.

 

美国联邦卫生官员本周三发布了新指导意见，该意见更改了新冠病毒感染者的“密切接触者"的定义，从而大大扩展了有感染新冠病毒风险的人群范围。

 

the change by the centers for disease control and prevention is likely to have its biggest impact in schools, workplaces and other group settings where people are in contact with others for long periods of time. it also underscores the importance of mask-wearing to prevent spread of the virus.

 

the cdc had ¹ defined a "close contact" as someone who spent at least 15 ² minutes within six feet of a confirmed coronavirus case. the updated guidance, which health departments rely on to conduct contact tracing, now defines a close contact as someone who was within six feet of an infected individual for a total of 15 minutes or more over a 24-hour period, according to a cdc statement wednesday.

 

the update comes as the united states is "unfortunately seeing a ³ trend, with cases increasing in nearly 75 percent of the country," jay butler, the cdc’s deputy director for infectious diseases, said wednesday at cdc headquarters in atlanta, in the first news conference administration officials permitted in more than eight weeks. people may be tired of the advice, butler said, but mask-wearing is more important than ever this fall and winter as americans head indoors, where transmission risks are greater.

 

the guidance about transmission of the coronavirus, which causes covid-19, had been discussed by cdc scientists for several weeks, according to a cdc official who ⁴ on the condition of ⁵. then came unsettling new evidence in a report published wednesday. cdc and vermont health officials discovered the virus was contracted by a 20-year-old prison employee who in an eight-hour shift had 22 interactions -- for a total of over 17 minutes -- with individuals who later tested positive for the virus.

 

"this article adds to the scientific knowledge of the risk to contacts of those with covid-19 and highlights again the importance of wearing face masks to prevent transmission," the cdc said.

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