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发布时间: 2025-05-24 11:17:01北京青年报社官方账号
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  郑州河南省郑州市眼科医院   

New research confirms that temperature and symptom checks miss many coronavirus infections. A study published Wednesday found that these measures failed to detect infections in new Marine recruits before they started training, even after several weeks of quarantine. Many recruits had no symptoms yet still spread the virus. The work has implications for colleges, prisons, meatpacking plants and and other places that rely on symptom screening. Doctors say more COVID-19 testing is needed, especially in younger people who often don't develop symptoms.“We spent a lot of time putting measures like that in place and they’re probably not worth the time as we had hoped,” said Jodie Guest, a public health researcher at Atlanta’s Emory University who had no role in the research.“Routine testing seems to be better in this age group” because younger adults often have no symptoms, she said.The study was led by researchers from the Icahn School of Medicine at Mount Sinai in New York and the Naval Medical Research Center.It involved 1,848 Marine recruits, about 90% of them men, who were told to isolate themselves for two weeks at home, then in a supervised military quarantine at a closed college campus, The Citadel in Charleston, South Carolina, for two more weeks. That included having a single roommate, wearing masks, keeping at least 6 feet apart and doing most training outdoors. They also had daily fever and symptom checks.The recruits were tested for coronavirus when they arrived for the military quarantine and 7 and 14 days afterward. Sixteen, or about 1%, tested positive on arrival and only one had any symptoms. Another 35 -- an additional 2% -- tested positive during the two-week military quarantine and only four had symptoms.Only recruits who tested negative at the end of both quarantine periods were allowed to go on to Parris Island for basic training.Genetic testing revealed six separate clusters of cases among the recruits.A separate study published Wednesday in the New England journal reports on an outbreak last spring on the aircraft carrier USS Theodore Roosevelt. Among the crew of 4,779, mostly young people, 1,271 became infected; 77% did not show symptoms when diagnosed and 55% never developed any.The case shows that “young, healthy persons can contribute to community spread of infection, often silently,” Dr. Nelson Michael of the Walter Reed Army Institute of Research wrote in a commentary. 2442

  郑州河南省郑州市眼科医院   

NEW YORK — The NYPD has suspended an officer without pay who was recorded using the bullhorn on his marked police vehicle on Saturday to shout "Trump 2020."The suspension is effective immediately without pay, the NYPD said Sunday.Brandon K Hines, who shared one of the videos on social media, said the incident occurred in the Flatbush neighborhood of Brooklyn."Trump 2020. Put it on YouTube. Put it on Facebook," the officer said as the vehicle sat at an intersection with its emergency lights on.The officer also encourages an unseen person to "take a picture" several times and called them a "tough guy." 615

  郑州河南省郑州市眼科医院   

NEW YORK (AP) — U.S. health officials have sparked a wave of confusion after posting guidelines that coronavirus testing is not necessary for people who have been in close contact with infected people. The new guidance was posted earlier this week on the website of the Centers for Disease Control and Prevention. The agency formerly advised testing for close contacts. But on Monday that was changed to say that testing is no longer recommended for symptom-less people who were within 6 feet of an infected person for more than 15 minutes. CDC officials have referred all questions to the agency’s parent organization, the U.S. Department of Health and Human Services in Washington. 691

  

NEW YORK (AP) — Workers have installed nearly 200 glittering Waterford crystal triangles on Times Square's New Year's Eve ball in preparation for a pandemic-limited celebration. The ball is a 12-foot geodesic sphere covered with more than 2,000 crystal triangles of various sizes. Some new crystals are swapped in every year. This year's addition features a new “Gift of Happiness” design represented by a sunburst of bright cuts radiating outward. The ball blazing with more than 32,000 LED lights will be dropped at 11:59 p.m. on New Year's Eve to ring in 2021. 571

  

NEW DELHI (AP) — India has registered 78,761 new coronavirus cases, the biggest single-day spike in the world since the pandemic began, just as the government began easing restrictions to help the battered economy. The Health Ministry on Sunday also reported 948 deaths in the past 24 hours, taking total fatalities to 63,498. India has now reported more than 75,000 infections for four straight days. Sunday’s surge has raised the country’s total virus tally to over 3.5 million and comes at a time when India is reopening its subway networks and allowing sports and religious events in a limited manner from next month as part of efforts to revive the economy. 670

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