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呼市肛肠科最好的医院
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发布时间: 2025-05-26 03:33:01北京青年报社官方账号
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  呼市肛肠科最好的医院   

The U.S. regulators who will decide the fate of COVID-19 vaccines are taking an unusual step: Asking outside scientists if their standards are high enough.The Food and Drug Administration may have to decide by year’s end whether to allow use of the first vaccines against the virus. Thursday, a federal advisory committee pulls back the curtain on that decision process, debating whether the guidelines FDA has set for vaccine developers are rigorous enough.“We will not cut corners, and we will only use science and data to make that determination,” FDA Commissioner Stephen Hahn pledged at a meeting of the Milken Institute Wednesday.Exactly how much data his agency needs to be sure a vaccine is safe and effective is a key question for the advisers. An even bigger one: If the FDA allows emergency use of a vaccine before final testing is finished, will that destroy chances of ever learning just how well that shot -- and maybe competitors still being studied -- really work?“We can’t lose sight of the fact that it is in our societal interest to see these trials to completion,” said Dr. Luciana Borio, a former FDA acting chief scientist who will be watching the advisers’ debate.Plus, multiple vaccines are being studied -- shots made with different technologies that each have pros and cons.“The first vaccine is not necessarily the best vaccine,” cautioned Dr. M. Miles Braun, a former FDA scientist now with Georgetown University School of Medicine. If the trials aren’t allowed to finish, it may be difficult or impossible to ever know for sure.It’s a critical moment in FDA’s 114-year history. The government has spent billions to race a vaccine through a research process that usually takes years, and FDA faces unprecedented pressure from the Trump administration, fueling public skepticism that politics could overrule science.Interest is so high, FDA is airing the meeting on YouTube. Here are some key issues the committee will discuss:HOW MUCH EVIDENCE IS NEEDED?FDA is requiring manufacturers to do studies of at least 30,000 people to prove if a vaccine protects and how safe it is. Those studies must include adequate numbers of people at highest risk from COVID-19 -- older adults, minorities and anyone with underlying health problems.FDA has made clear that any vaccine must be at least 50% effective. And while the studies are designed to run for two years, companies may get enough evidence the shots are protective -- in at least some people -- to stop the trials early and seek what’s called an “emergency use authorization” for wider vaccinations.Despite White House objections, the FDA told vaccine makers earlier this month not to seek that speedier review until they’ve tracked at least half their trial participants for two months. With other vaccines, that’s about the amount of time when major side effects crop up.That’s not long enough, said the head of the non-profit ECRI Institute, which reviews medical technology for hospitals and insurers. In comments submitted to the advisory committee, ECRI’s Dr. Marcus Schabacker said FDA should require six months of follow-up.“Doing any less would simply risk too much, and the consequences may be severe,” he wrote. “A weak vaccine that loses public trust could poison the well for epidemic control for many years.”WOULD EMERGENCY USE DERAIL FULL ANSWERS ABOUT VACCINES?Normally when a study ends because of evidence that a vaccine is working, the participants who got dummy shots are offered the real thing.But if FDA allows emergency use of a COVID-19 vaccine, that’s not the same as having full proof the shot works, Borio cautioned.And if the participants in the placebo group are immediately offered the real shot, researchers may not be able to get answers about all the high-risk groups in the study — or tell how long the vaccine’s protection lasts, a process expected to take many more months.But Pfizer Inc., which with Germany’s BioNTech is developing one of the leading candidates, told FDA that if it’s granted emergency use authorization, it “would have an ethical obligation” to alert study participants who got a placebo and allow them vaccine access. The company wants FDA to look into “other scientifically and statistically sound methods” to determine long-term safety and effectiveness.Pfizer’s stance is likely to face pushback. The Infectious Diseases Society of America states that FDA’s panelists “should insist” that vaccine developers “present a compelling case” for how they will complete their trials if FDA grants early authorization of their vaccine.Clearing a vaccine based on premature or faulty data “could cause more harm” by “further eroding public confidence in all vaccines,” the group said.It’s an unprecedented dilemma. The FDA has previously allowed emergency use of only one vaccine, a decades-old shot that in 2005 was authorized to prevent anthrax poisoning.This time around, multiple COVID-19 vaccines are in the pipeline. Pfizer competitor Johnson & Johnson cautioned that early FDA clearance of one vaccine could “jeopardize integrity” of other ongoing trials if patients decide to drop out to seek the first cleared shot instead.The company asked regulators to explain what options are available to ensure completion of all ongoing COVID-19 vaccine trials.WHAT ABOUT LONG-TERM SAFETY MONITORING?Even a study of 30,000 people cannot spot a side effect that only strikes 1 in 100,000. So the government is planning extra scrutiny of every COVID-19 vaccine to hit the market.At first there will be limited doses given to just certain high-risk people -- and those early recipients are to get text messages daily for the first week after vaccination, and then weekly out to six weeks, asking how they’re feeling.FDA also will be checking databases of electronic health records and insurance claims, looking for any red flags.“There’s a kind of tracking that has to take place here on a massive basis that hasn’t taken place before,” said Dr. Jesse Goodman of Georgetown University, a former director of the FDA’s vaccine and biologics center.___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. 6274

  呼市肛肠科最好的医院   

The U.S. has now recorded at least 100,000 cases of COVID-19 each day for the last three weeks.On Monday, at least 169,190 new cases of the coronavirus were recorded throughout the U.S., marking 21 consecutive days that the country has seen at least 100,000 new COVID-19 cases.During that time span — dating back to Nov. 2 — the number of people in the country hospitalized with complications from the virus has nearly doubled from 48,557 to 85,836. Currently, about 69% of those hospitalizations are occurring in the South and Midwest, meaning some hospitals in those areas — particularly rural hospitals — are currently operating at capacity.The massive spike in cases has also caused the number of deaths linked to COVID-19 on a rolling 7-day average to nearly doubled from 826 a day to 1,515 a day. The last time the U.S. saw as many deaths per day as it sees now came back in mid-May when the country was still recovering from the virus' silent and uncontained spread in early spring. Over the weekend, the U.S. surpassed 3 million new cases in November alone. The country has recorded 12.4 million cases of COVID-19 since the pandemic began, meaning about one-quarter of all of those cases have occurred this month alone.Despite the bleak outlook on the state of the pandemic in the country, Dr. Anthony Fauci, the county's top expert on infectious diseases, warned Monday that the pandemic could worsen further. He said that if Americans don't follow common-sense public safety measures on Thanksgiving, cases could spike even further in December."The chances are that you will see a surge superimposed on a surge," Fauci said.Fauci recommends limiting Thanksgiving gatherings to members of a single household. He also says Americans need to continue to follow five common public safety measures in order to limit the spread: Adopt uniform mask-wearing, keep social distance, avoid large crowds, gather outdoors as opposed to indoors and continuously wash hands. 1983

  呼市肛肠科最好的医院   

The Sikh community is speaking out after a Sikh Canadian minister was asked to take off his turban while going through a TSA checkpoint at Detroit Metro Airport.The incident happened in April 2017.  Navdeep Bains, Canada’s Minister of Innovation, Science and Economic Development, went through the TSA checkpoint once without any issues but was asked to go through additional screenings because of his turban."Once they realized my position, who I was, I was ultimately allowed to fly but for me this is an issue that speaks for discrimination and discrimination happens with many people," Bains said. The agency is now issuing a statement and the U.S. government is apologizing to Canada.TSA responded to the incident saying in part: 767

  

The San Luis Obispo County (California) Sheriff's Office confirms one of its deputies was shot early Wednesday morning in Paso Robles, California.At a Wednesday afternoon press conference, Sheriff Ian Parkinson described the incident as an “unprovoked attack on law enforcement” by a suspect “laying in ambush” at the police department in Paso Robles.According to officials, the situation began with shots fired at the Paso Robles Police Department building.San Luis Obispo County Sheriff's Office spokesperson Tony Cipolla says shots were fired at the Paso Robles Police Department building at about 3:15 a.m.The deputy was airlifted to a trauma center and is reportedly in serious but stable condition.Paso Robles police called for help from other agencies as they responded to the shooter outside, and Parkinson says the gunman shot at police cars as they entered the downtown area to assist.Officials released photos (pictured above) of a possible suspect wanted in connection with Wednesday's shooting. 1015

  

The vice presidential debate between Mike Pence and Kamala Harris next week will go on as scheduled after President Donald Trump, the First Lady, and others have tested positive for the coronavirus on Friday.An official with the Commission on Presidential Debates confirmed that no changes are anticipated to the Wednesday night debate in Salt Lake City. Both Pence and Harris underwent tests for the coronavirus on Friday and tested negative.Pence’s physician said in a memo that the vice president was not considered a “close contact” of anyone infected with COVID-19 and was not required to quarantine.“Vice President Mike Pence remains in good health and is free to go about his normal activities,” said Navy Lt. Commander Dr. Jesse Schonau in a statement.The one debate between the vice presidential candidates will take place Wednesday in Salt Lake City at the University of Utah. It will be moderated by Susan Page, the Washington Bureau Chief for USA Today. 974

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