济南到医院检查男科(济南男科的治疗医院) (今日更新中)

As the COVID-19 pandemic progresses, researchers say it is important to track how the coronavirus mutates because it could affect the efficacy of a vaccine.Like all living cells, viruses evolve their chemical make-up changes. In viruses like the flu, that happens frequently, which is why every year there is a new vaccine to treat whatever strain is expected to circulate. With COVID-19, however, those mutations happen much slower, according to research out of Arizona State University.“One of the things we’re still keeping an eye on is the evolution of this virus because that virus is still around in the community,” said Dr. Efrem Lim, an assistant professor at ASU. “Everyone is coming in blind to this. This is a novel virus. This isn’t something we have seen before.”In March, Arizona State University played host to our country’s fourth COVID-19 case. As soon as it was detected, Dr. Lim started studying how the virus mutates and sent his findings to the World Health Organization. It's something that still continues to this day.“This virus, overall, mutates pretty slowly, which is a good thing,” said Dr. Lim. “However, we can have instances where the virus can have very large, dramatic, mutations, such as deletions in the genome.”While rare, Dr. Lim says those mutations can be significant as it changes how the virus acts inside the body.Currently, scientists are focusing much of their efforts on identifying ways to eliminate the function of the spike protein in COVID-19, as it is the way the virus binds to our cells and infects them (spike proteins are the stalks that protrude from the center of the virus that make it so recognizable).“It is very good news that the virus is not changing rapidly,” said ASU virologist Dr. Brenda Hogue. “We will have to see over time, as the virus continues to circulate, as we put a vaccine into play, whether or not there will be any issues.”Dr. Lim says right now there does not appear to be any issues because the virus mutates slowly, but he adds it could adapt to a vaccine once one begins to circulate.He says more testing needs to be done to determine that, however. 2140

As one of the world's most famous prehistoric monuments, Stonehenge still holds many secrets despite centuries of study. For the first time, new research is lifting the veil on the people who are buried at Stonehenge.The study was published in the journal Scientific Reports on Thursday.Much of the previous research around the monument in Wiltshire, England, has centered around how or why Stonehenge was built -- not the people buried there or who built it.But studying the human remains at Stonehenge is no easy task. In addition to dating back to 3,000 BC, the remains were also cremated. During the early phase of Stonehenge's history, it largely served as a cemetery.Fortunately, lead study author Christophe Snoeck, post-doctoral researcher at the Vrije Universiteit Brussel, combined his passions for archeology and chemical engineering to pioneer developments in archaeological analysis.The results revealed that 40% of the people buried at Stonehenge likely came from west Wales, the suggested origin of the site's smaller bluestones, and they most likely helped transport the stones and build Stonehenge. Signals from the bone analysis suggested that within the last ten years of their lives, these people were not living at Stonehenge nor originally from the area around Stonehenge, known as the Wessex region."Our results are the first one to provide direct evidence on the origin of those buried at Stonehenge, shedding light on the importance of the site in the Neolithic landscape," Snoeck said in an email. 1531

Authorities have identified a Facebook post believed to have been made by the gunman who killed 12 people at a bar in California, a law enforcement official said.Ian Long, 28, burst into the Borderline Bar & Grill in Thousand Oaks and opened fire with a Glock .45-caliber handgun as patrons line-danced late Wednesday night.Long is believed to have posted the social media message around the time of the attack, according to the official, who is familiar with the investigation.In it, the writer says: "I hope people call me insane ... (laughing emojis).. wouldn't that just be a big ball of irony? Yeah ... I'm insane, but the only thing you people do after these shootings is 'hopes and prayers'.. or 'keep you in my thoughts'... every time... and wonder why these keep happening. " 796

As novel coronavirus cases soar across the country, states are struggling to keep up with the demand for testing. Some states are reporting big backlogs and difficulty getting tests.“We need to actually continue doing a bunch of work in America to figure out additional approaches to do testing,” said Dr. Bob Kocher.Dr. Kocher is the former co-chair of California's Testing Task Force. The state formed the team back in March to figure out how to get everyone tested. Back then, they were struggling to do 2,000 tests a day. Now, they're doing more than 100,000 a day.“California, and most states, had giant shortages of the world’s most expensive Q-tips, called swabs, that you need to collect the samples and the people who make them couldn’t make more of them,” Dr. Kocher explained. “We worked with companies to 3-D print them and to source those from other places in the world and buy them and bring them to California.”They worked to find labs that could do high-capacity testing and expanded the number of testing sites. But as cases increased across the state and nation, five months into the pandemic, testing turnaround time is an issue.“It’s something I’m concerned about as demand for testing grows everywhere in the country and on the earth, the labs are going to sporadically have backlogs, and over time, they could have backlogs because it’s hard to make more supply of the test,” Dr. Kocher said.Dr. Kocher says it depends on where the test is sent. Some labs have backlogs and it’s a logistics issue. If the lab your test site is using is in another part of the country, it'll likely take longer to get results.In a statement, Quest Diagnostics said, "We are grappling with surging demand that is outpacing capacity. This is due to surging cases of COVID-19 across much of the United States, particularly the West, Southwest and South. We have a prioritization program to help direct testing to patients most in need. Our turnaround time for priority one patients is 1 day on average."In a recent press conference, California's Health and Human Services Agency Secretary Dr. Mark Ghaly said supply chain challenges forced the state to prioritize who gets tested first.“Surges across the nation have created challenges of getting tests processed, not just collected, and ensuring our guidelines not only say who needs to be tested but give guidance to labs on which specimens to process first,” Dr. Kocher said.Right now, priority means those who are hospitalized, healthcare workers, first responders, social service employees, those who are 65 and older and those with chronic medical conditions. But, we simply need more tests.“The challenge with COVID-19 is that each person infects two, three more people and that leads to exponential growth of people who are infected and exponential growth in demand for testing,” Dr. Kocher said. “The companies who manufacture tests have been extraordinary scaling up their capacity to manufacture tests they can grow them by 10, 30 maybe a 100 percent, but the demand for COVID testing is growing 1,000 percent.”The American Clinical Laboratory Association which represents Quest and other labs released a statement saying many labs are getting more test orders than they're able to process in a single day.In a statement, the company said, "We can’t do it alone. Laboratories, diagnostic manufacturers, ordering providers, public health officials, states and importantly, the federal government – including Congress and the Administration – all have a role to play in addressing the challenges hampering our nation’s response to this public health crisis."The test, Dr. Kocher says, only tells you if you're infectious at the time you were tested. It's yet another hurdle for states to tackle."So, we need to figure out what is the mechanism to test people at the right frequency to make us all safe and fell confident in going to work, school, nursing home or being an essential worker,” he said. “It’s really important.”Figuring out what that looks like means looking at new technologies, getting the government involved and working on our manufacturing sector so we have more tests and fewer logistical problems as we consistently try to keep up with the virus that seems to be one step ahead of us all. 4276

As states begin to reopen, a new stage in the pandemic means elective surgeries are back on schedule.For 51-year-old mother of two Honaire Murillo, the pandemic delayed a much needed spinal surgery.“The shooting pains all the time and you know I had kids I have to run around. And so, it took about a year and I was so disappointed,” says Murillo.Twenty-four years ago, the aspiring pro-bodybuilder’s dreams were cut short when she was hit by a motorboat while visiting Puerto Rico on business.More than 20 surgeries later, Murillo needed another one.“The pain started coming back and so I knew I was going to have more surgery,” she says.Last week, doctors at Rush University Medical Center’s Midwest Orthopaedics in Chicago were able to get Murillo into surgery for a first-of-its-kind procedure.It was a minimally invasive spine surgery that utilized augmented reality.“The efficiency this provides because of the accuracy and the visualization of the spine is remarkable,” says Dr. Frank Phillips, the director and minimally invasive spinal surgeon at Rush who performed the procedure.A headset guidance system allowed Dr. Phillips to see Murillo’s spinal anatomy – essentially giving him X-ray vision.“That's exactly what it is,” says Dr. Phillips. “It really is X-ray vision. Except it's not just X-ray vision, you're actually seeing the real spine through the skin.”The CT scanned images are directly projected onto the surgeon’s retina and then superimposed right on top of the patient’s surgical area.“I was just blown away,” says Dr. Phillips. “The minute I put my headset on and looked down at the spine it was like that wow moment. I was like ‘this is crazy.’”Researchers say the FDA-cleared x-vision system could revolutionize the way surgeons perform complex procedures.“It's so accurate so precise the visualization so good you can do the surgery more efficiently which obviously translates into less anesthetic time and advantages to the patient,” says Phillips.For Murillo, who eventually went pro 15 years after her accident, this latest groundbreaking surgery has her thinking about another return to competition.“I'm still looking to see if I could comeback one more time. I'm not sure. But, yeah to me it's a dream.”Augmedics, the maker of the technology says it plans to explore the x-ray vision technology beyond just spinal surgery. 2365

来源：资阳报