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发布时间: 2025-05-26 09:23:56北京青年报社官方账号
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  宁德大功率工业吸尘器   

Laboratories across the U.S. are buckling under a surge of coronavirus tests, creating long processing delays that experts say are undercutting the pandemic response.With the U.S. tally of confirmed infections at nearly 4 million Wednesday and new cases surging, the bottlenecks are creating problems for workers kept off the job while awaiting results, nursing homes struggling to keep the virus out and for the labs themselves as they deal with a crushing workload.Some labs are taking weeks to return COVID-19 results, exacerbating fears that people without symptoms could be spreading the virus if they don’t isolate while they wait.“There’s been this obsession with, ‘How many tests are we doing per day?’” said Dr. Tom Frieden, former director of the Centers for Disease Control and Prevention. “The question is how many tests are being done with results coming back within a day, where the individual tested is promptly isolated and their contacts are promptly warned.”Frieden and other public health experts have called on states to publicly report testing turnaround times, calling it an essential metric to measure progress against the virus.The testing lags in the U.S. come as the number of people confirmed to be infected worldwide passed a staggering 15 million, according to data compiled by Johns Hopkins University. The U.S. leads the world in cases as well as deaths, which have exceeded 142,000.New York, once by far the U.S. leader in infections, has been surpassed by California, though that is partly due to robust testing in a state with more than twice the population of New York.Guidelines issued by the CDC recommend that states lifting virus restrictions have a testing turnaround time of under four days. The agency recently issued new recommendations against retesting most COVID-19 patients to confirm they have recovered.“It’s clogging up the system,” Adm. Brett Giroir, assistant health secretary, told reporters last week.Zachrey Warner knows it all too well.The 30-year-old waiter from Columbus, Ohio, was sent home from work on July 5 with a high fever a few days after he began feeling ill. He went for a test five days later at the request of his employer.Almost two weeks and one missed pay period later, he finally got his answer Wednesday: negative.Though Warner said most symptoms — including fever, diarrhea, chest tightness and body aches — stopped a few days after he was tested, he wasn’t allowed to return to work without the result.It was “frustrating that I’ve missed so much work due to testing taking forever,” Warner said. “It is what it is ... (but) I’m glad I’m negative and happy to be able to get back to work this week.”Beyond the economic hurt the testing lags can cause, they pose major health risks, too.In Florida, which reported 9,785 new cases and a rise in the death toll to nearly 5,500, nursing homes have been under an order to test all employees every two weeks. But long delays for results have some questioning the point.Jay Solomon, CEO of Aviva in Sarasota, a senior community with a nursing home and assisted living facility, said results were taking up to 10 days to come back.“It’s almost like, what are we accomplishing in that time?” Solomon said. “If that person is not quarantined in that 7-10 days, are they spreading without realizing it?”Test results that come back after two or three days are nearly worthless, many health experts say, because by then the window for tracing the person’s contacts to prevent additional infections has essentially closed.“The turnaround times, particularly across the South are too long,” Dr. Deborah Birx of the White House coronavirus task force said on Fox.Birx said the U.S. had shorter turnaround times in April, May and early June, but that “this surge and this degree of cases is so widespread compared to previously,” she said.Dr. Leana Wen, a public health professor at George Washington University said it’s reasonable to tell people awaiting test results to isolate for 24 hours, but the delays have been unacceptable.“Imagine you tell a parent with young children to self-isolate for 10 days or more without knowing they actually have COVID? I mean, that’s ridiculous. That’s actually absurd,” Wen said.U.S. officials have recently called for ramping up screening to include seemingly healthy Americans who may be unknowingly spreading the disease in their communities. But Quest Diagnostics, one of the nation’s largest testing chains, said it can’t keep up with demand and most patients will face waits of a week or longer for results.Quest has urged health care providers to cut down on tests from low-priority individuals, such as those without symptoms or any contact with someone who has tested positive.As testing has expanded, so have mask orders and other measures aimed at keeping infections down. Ohio, Indiana, Minnesota and Oregon became the latest to announce statewide mandatory mask orders Wednesday.The U.S. is testing over 700,000 people per day, up from less than 100,000 in March. Trump administration officials point out that roughly half of U.S. tests are performed on rapid systems that give results in about 15 minutes or in hospitals, which typically process tests in about 24 hours. But last month, that still left some 9 million tests going through laboratories, which have been plagued by limited chemicals, machines and kits to develop COVID-19 tests.There is no scientific consensus on the rate of testing needed to control the virus in the U.S., but experts have recommended for months that the U.S. test at least 1 million to 3 million people daily.Health experts assembled by the Rockefeller Foundation said last week that the U.S. should scale up to testing 30 million Americans per week by the fall, when school reopenings and flu season are expected to further exacerbate the virus’s spread. The group acknowledged that will not be possible with the lab-based testing system.The National Institutes of Health has set up a “shark tank” competition to quickly identify promising rapid tests and has received more than 600 applications. The goal is to have new testing options in mass production by the fall.Until then, the backbone of U.S. testing remains at several hundred labs with high-capacity machines capable of processing thousands of samples per day. Many say they could be processing far more tests if not for global shortages of testing chemicals and other materials.Dr. Bobbi Pritt of the Mayo Clinic in Rochester, Minnesota, says the hospital’s machines are running at just 20% capacity. Lab technicians run seven different COVID-19 testing formats, switching back and forth depending on the availability of supplies.At Emory University Hospital in Atlanta, lab workers lobby testing manufacturers on a weekly basis to provide more kits, chemicals and other materials.“There’s no planning ahead, we just do as many as we can and cross our fingers that we’ll get more,” said Dr. Colleen Kraft, who heads the hospital’s testing lab.___This story has been corrected to show that the CDC has issued guidelines recommending against repeat testing for patients recovering from coronavirus.___Webber reported from Fenton, Michigan, and Sedensky reported from Philadelphia. Associated Press writers Kelli Kennedy in Fort Lauderdale, Florida, Michelle R. Smith in Providence, Rhode Island, and Medical Writer Mike Stobbe in New York contributed to this report.___The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education. The AP is solely responsible for all content. 7624

  宁德大功率工业吸尘器   

LAND O' LAKES, Fla. -- A State Alligator Trapper responded to a home in Land O' Lakes on Tuesday to remove an 8.5-foot-long alligator from underneath a truck. A resident in Sable Ridge called deputies who then called a trapper to come and remove the gator after the alligator was found in his driveway underneath his pickup truck. Alligator battles python on Florida golf courseAlligators stick snouts through ice to survive freezing conditions, swamp park saysGator carries huge fish in its mouth across Florida golf course 542

  宁德大功率工业吸尘器   

LAS VEGAS, Nev. (KTNV) - A security guard opened fire at a Ross Dress for Less in Las Vegas Saturday, sending customers into hiding for their safety, witnesses said.The shooting happened Saturday around 4 p.m. at the store in the Blue Diamond Crossing strip mall on Blue Diamond Rd.Dramatic video shows Ross customers, including a child, ducking under clothes racks as shots rang out.Watch the video:Witnesses said police arrived and exchanged shots with the gunman, who was hit by police gunfire. He was taken to a hospital for surgery. No one else was hurt.Shoppers at nearby Kohl's and Target stores were evacuated or sheltered in place during the exchange.The security guard was reportedly arguing with the store manager before the shooting. When police arrived, he also fired at them. It is not known at this time why the argument started.No personal information has been released about the security guard. The name of the officer who shot him will be released this week, according to Las Vegas Metropolitan Police Department policy.  1057

  

LAGUNA BEACH, Calif. (AP) — The hue and cry over the placement of a bright American flag graphic on police cars has leaders in a small coastal Southern California city considering whether to tone down the design.The Laguna Beach City Council will decide Tuesday night whether to keep the current logo or choose an alternative.Some residents feel the red, white and blue design is too aggressive while others are surprised anyone would object to the American flag.Mayor Pro Tem Steve Dicterow told the Los Angeles Times the council is simply facing "a very narrow decision" about the brightness of the colors, but that the issue has devolved into a broader national conversation about patriotism.He said he has received hundreds of emails from people around the country, mostly in support of keeping the flag designs on the car.The council agreed earlier this year to repaint its squad cars in black and white with the stars and stripes running through the word "police" on the doors. The city has 11 police vehicles.The proposed graphic the council approved in February was a more muted version of the design that now appears on the cars."Clearly, the way it looks on the car is not what anyone expected it to look like," Dicterow said. "I think it's reasonable that we're going to look at it again so that whatever we (approve) is exactly what we put on the car." 1372

  

LAS VEGAS — Big lavish weddings aren’t in style right now. That’s because the global pandemic has couples rethinking their plans.A new Las Vegas business is offering a unique way to scale back wedding ceremonies in light of COVID-19.I Do Drive Thru Weddings is an Australian-based company that’s branching out in Las Vegas. They host elopements and tiny weddings.Couples can choose their own adventure — they can ump into a limo, vintage vehicle, or anything on wheels and head to a special spot to say “I do.” Couples can also walk to their destination if they prefer.“This is how I Do Drive Thru came to be as we realized getting married is still absolutely an essential business,” said Berlynn Holdmann, the lead officiant in Las Vegas. “It can be done within the limitations and guidelines that are being enforced with social distancing measures.”Couples can skip the cost of a venue, DJ, and catering costs. The average wedding costs come out to 0, Holdmann said.There’s an option to livestream the ceremony, so loved ones can be a part of the celebration from a distance.I Do Drive Thru’s website says they will offer a full refund in the event of a total lockdown.This story was originally published by Kelsey McFarland on KTNV in Las Vegas. 1259

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