沈阳高级电动搏式成人足背动脉及静脉穿刺练习模型(南宁气管壁解剖模型) (今日更新中)

Considered the coronavirus holy grail, antibodies are believed to give us some level of immunity from the virus. They form after a person fights off COVID-19 and can be detected through a serological test, better known as an antibody test. "There are some really great companies building antibody tests, and there are some not so great, bad actors, building antibody tests. So you have to be really careful," says Jon Carder, co-founder and CEO of Vessel, a San Diego company created four years ago to provide in-home wellness tests. Early in the pandemic, the U.S. Food and Drug Administration allowed these tests to be sold and distributed without federal review, as long as the company notified the FDA it was offering a test, performed self-validation studies, and included a disclaimer on the test results. The FDA is now cracking down on the bad actors, creating a list of tests that should no longer be distributed. Only a handful of manufacturers have been granted FDA Emergency Use Authorization, meeting a certain threshold for accuracy.Carder says states and even countries have been fooled by the bad actors, purchasing inadequate tests. "We were talking to a city government, a big city, and were blown away when we got a response that they were thinking about buying antibody tests from a certain manufacture who had claimed they were FDA approved. And the state had sort of taken their word for it, and they weren't," said Carder. Vessel had been preparing to release its in-home wellness tracker, which tests for health markers like vitamins, minerals, toxins, and cortisol. When the pandemic hit, the company adapted its technology to be used in the fight against COVID-19. "We take existing antibody tests, the good ones, the ones that are accurate and that the FDA has approved for emergency use, and we enable those to be done safely and accurately at home," said Carder. They've created a kit with step-by-step instructions to do the blood test at home. The test card is then scanned through the Vessel app and provides results from a medical professional within a half-hour. The FDA has already approved in-home tests to diagnose active infections – but Carder says the sample must be sent to a lab, and the user must have symptoms or another qualification to get one. And he says they can be costly. "Ours could be one of the first, or the first, antibody test done at home, no lab needed," said Carder. Just this week, the FDA issued three warning letters to companies making false claims on their in-home antibody tests.Vessel has completed its usability studies and is now in clinical trials with the FDA. "Our job is to prove it can be done safely at home and to show that via clinical trials. The FDA really makes the call if they're going to enable antibody testing at home," said Carder. He says the test would be cost-effective, anywhere from -, or around with medical consultation. If approved by the FDA, Carder estimates millions of people could be tested within the first few months. "There's something really great about the peace-of-mind that comes from doing a test, and that may be one of the biggest benefits," said Carder. But while the FDA is only approving the most accurate tests, none are 100 percent accurate and could still lead to false positives. 3314

CNN reporter Jim Acosta's press credentials for the White House were stripped "until further notice," after Press Secretary Sarah Sanders accused him of "placing his hands on a young woman."Sanders tweeted out a video of Acosta at a news conference questioning President Trump, but some sources are saying the video is doctored.The news conference aired nationally before the video was released, and many people saw the original incident. They say the video appears to have cut out Acosta saying "pardon me, ma'am" to a White House intern who was reaching to take away a microphone.In the allegedly doctored video, it appears Acosta's arm movement of pushing away the intern was sped up. 695

Colgate, Cream of Wheat and Mrs. Butterworth are the latest brands reckoning with racially charged logos. New York-based Colgate-Palmolive say it's reviewing its Darlie toothpaste brand, which is popular in Asia. Prior to 1989, the brand was known as Darkie and featured a singer in blackface as its logo. New Jersey-based B&G Foods, which makes Cream of Wheat hot cereal, said it’s reviewing its logo, which features a smiling black chef holding a bowl of cereal. Cream of Wheat's packaging includes an image of a black chef. In early advertisements, copy refers to the chef as "Rastus" — a term now considered a slur. The name refers to a minstrel show caricature of a stereotypically happy black man. Uncle Ben's rice, which also uses a black man's portrait on its packaging, said it planned to "evolve" the brand, but did not offer specifics.And Chicago-based Conagra Brands says its female-shaped Mrs. Butterworth's bottles are intended to evoke a “loving grandmother.” But the company said the packaging could be misinterpreted. "We stand in solidarity with our Black and Brown communities and we can see that our packaging may be interpreted in a way that is wholly inconsistent with our values," the company said in a statement. The soul-searching comes in the wake of PepsiCo’s announcement that it’s renaming its Aunt Jemima syrup brand. 1359

Colleges across the country are finalizing plans to welcome students back. Some are bringing students fully back on campus, while others are going completely digital. Regardless of what colleges decide, many students are still planning to live on or near campus."We've come up, we think, with a plan that provides a lot of flexibility in options and recognizes the difficulties and strengths that our students, faculty and staff are faced with in light of COVID-19," said Lisa Lynch, the Provost at Brandeis University just outside of Boston.Brandeis, like Harvard, Princeton, Georgetown and all California State universities, will be offering online classes to students in the fall to help prevent the spread of COVID-19. There will still be in-person classes at a majority of universities offering online courses.Harvard is allowing minimal in-person classes, while Princeton is only allowing first- and third-year students on campus for the first semester and second- and fourth-year students for the second semester.Brandeis is offering some hybrid classes that are half online and half in person with small groups, but class sizes will be dramatically reduced."A mix of taking some lectures that perhaps have been pre-recorded or even listening in through Zoom on a live lecture, but then having opportunities to have small, in-person meetings with other students and professors and teaching assistants," said Lynch.All in-person classes will have a maximum of 28 students. Despite the online offerings and class restrictions, university officials say most students are still making the decision to live at school, not take classes online while living at home. This begs the question – will the online classes even make a difference amid the current COVID-19 pandemic?"I think the real hard thing is where you share a dorm room. Two people in the same room is hard to social distance in any real respect, in that case. But if a lot of people are online and you only have one person per room, then you have an ability to have a little more social distancing," said Dr. Kenny Banh, an emergency physician and Assistant Dean of Undergraduate Medical Education at UCSF-Fresno.Brandeis is only allowing one person per dorm room and even reserving extra housing for students who may test positive for COVID-19 and need to quarantine while at school. It's one of numerous brand-new health and safety procedures being implemented at the school, which also include twice weekly free coronavirus tests for all students and staff."The testing - asymptomatic testing - is mandatory. We'll also have everyone when they come to campus do a daily health gestation test. It's a very quick online tool that goes through and asks about fever, how they're feeling, if they're a student. And if they answer a question and it raises a flag, they’ll be immediately directed to our health center," said Lynch.With all the precautions universities are taking, it'll still be tough to prevent the social interactions that students want and need."There's no control with off-campus living, obviously, and students unfortunately tend to congregate together because it's a cheaper cost of living, right? I was a poor college student, so you often share a space because that’s what you could afford and you're trying to tend for the lowest cost possible. Unfortunately, we’ve showed our ability to socially distance and self-isolate in the younger generation is not as good," said Banh.While colleges won't be able to prevent off-campus social gatherings, many acknowledge that most healthy students aren't at the highest risk for COVID-19 complications and that any forced isolation at this critical age of their emotional and social development could do more harm than good."Recognizing in surveys, we saw with our students, in particular with our students in the spring, the process of being at home and trying to continue with studies contributed to a significant increase in stress, depression and sense of isolation," said Lynch."I think universities are doing the best they can do to be responsible. I think having an online option and having a significant part of people online will actually mitigate the risk for those there in person. So, if you take half the people and half of them are not there, then social distancing and all that stuff becomes much safer, especially for those people that are physically there," said Banh.Brandeis is also using advanced contact tracing technology so that if and when a student or staff member tests positive for COVID-19, they're able to immediately determine all classmates, residential halls and more, that are affected. They’re hoping to quickly mitigate any spread of virus in an academic environment that thrives on social interaction. 4773

Coronavirus cases are spiking nationwide, and experts say Florida could be the next epicenter in the pandemic.That warning comes via Wednesday's projections from a model by scientists at Children's Hospital of Philadelphia and the University of Pennsylvania.Florida was one of 10 states that saw a record number of new COVID-19 cases this week.According to the model, Florida has "all of the markings of the next large epicenter of coronavirus transmission" and risks being the "worst it has ever been."Twenty-one states are seeing an upward trend in new cases of the coronavirus. 588

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