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HAMPTON ROADS, Va. - As coronavirus continues to rage across the country, scientists are inching closer to developing a COVID-19 vaccine.Dr. Doug Mitchell used to be a pediatric infectious diseases specialist at CHKD and EVMS. He is currently the medical director of CHKD Medical Group and a pediatrician at Norfolk Pediatrics.“If we’re able to stick to the science in developing the vaccine, then that would be comforting if we could stick to the science and develop an effective and safe vaccine,” said Mitchell.Mitchell said the speed at which researchers are developing a vaccine to combat COVID-19 is nothing short of a miracle, but sticking to the clinical science behind the advancement is key for an effective and safe vaccine - and that takes time.“The stated goal that I saw by the CDC and/or FDA of wanting a vaccine that shows at least 50% protection and six months of safety data, that takes time,” he said. “We need a chance to show the safety profile of any new vaccine under the parameters of following the best science that we could follow.”Mitchell understands the process involved in developing a vaccine.More than 20 years ago, he was an investigator in several pediatric clinical trials. Many of the vaccines that came out of his lab are still used in children today.While there are still growing concerns about vaccines, the benefits outweigh the risks.“The flu vaccine clearly saves lives, clearly prevents illnesses, but it’s not 100% protective either, but we know it does have benefits,” Mitchell said. “The advantage there is the flu vaccine has been out for decades and we know its safety profile.”Similar to the rapid speed of developing a COVID-19 vaccine, Mitchell said a vaccine for H1N1, better known as the swine flu, was quickly put on the market.“The difference is, we already had decades of history of flu vaccines and their safety, so all that happened was developing the same flu vaccine that was protective against a different strain,” he said. “That’s a different ballgame than starting a vaccine against a totally different virus.”While the research continues, the fight against COVID-19 is far from over.According to Mitchell, the spread of the virus decreases when you reach heard immunity where enough of the population is immune.This story was first reported by Antoinette DelBel at WTKR in Norfolk, Virginia. 2363

HONG KONG – Scientists at the University of Hong Kong claim to have the first evidence of someone being reinfected with the coronavirus that causes COVID-19.They said Monday that genetic tests show a 33-year-old man returning to Hong Kong from a trip to Spain in mid-August had a different strain of the virus than the one he’d previously been infected with in March.The man had mild symptoms the first time and none the second time, so his previous infection may have helped prevent serious illness.Experts say waning immunity could have implications for vaccine development and that the case shows the need to keep up social distancing and other prevention measures.Dr. Kelvin Kai-Wang To, who led the group of scientists, told The Associated Press that it’s unknown how many people can get reinfected, but there are probably more out there.Even if someone can be infected a second time, it’s not known if they have some protection against serious illness, because the immune system generally remembers how to make antibodies against a virus it’s seen before. 1069

Grant Imahara, known for his roles on Discovery Channel's "MythBusters" and Netflix's "White Rabbit Project," has died, according to a statement from the Discovery Channel. He was 49 years old.“We are heartbroken to hear this sad news about Grant. He was an important part of our Discovery family and a really wonderful man. Our thoughts and prayers go out to his family,” the statement reads. 401

Harvard University has announced plans to bring back up to 40 percent of their student body back to campus this fall.They also stated all course instruction at the undergraduate and graduate level will be delivered online, whether or not students are on campus. The fall semester begins on September 2 at Harvard.Those being allowed back to campus are all first-year students and those who must be on campus to progress academically. “This will enable first-year students to benefit from a supported transition to college-level academic work and to begin to build their Harvard relationships with faculty and peers,” the statement read.Harvard said this is only for the fall semester and if current restrictions are in place next year, their priority would be to bring back graduating seniors for their last semester on campus.Those coming back to campus will be tested for COVID-19 once they arrive, and then re-tested every three days while they are on campus.“Without a vaccine or effective clinical treatments for the virus, we know that no choice that reopens the campus is without risk. That said, we have worked closely with leading epidemiologists and medical experts to define an approach that we believe will protect the health and safety of our community, while also protecting our academic enterprise and providing students with the conditions they need to be successful academically,” read an online statement from University President Larry Bacow, FAS Edgerley Family Dean Claudine Gay, and Danoff Dean of the College Rakesh Khurana.The university’s statement says tuition for this upcoming school year will remain unchanged, at ,653.First-year students have until July 24 to defer their enrollment, and Harvard is making advisers available for older students considering a leave of absence. 1816

General Motors recently announced that it would be shutting down five car factories in the United States and Canada and cutting 14,000 jobs. GM said at the time that factory workers would be offered jobs at other facilities where production is being increased and on Friday it offered an update on how things are going.Of the jobs GM plans to cut, 2,800 are hourly employees in the United States. These are generally assembly line workers who punch in and out for work each day as opposed to employees who are paid a salary.The automaker announced Friday that 1,100 of those hourly workers have volunteered to transfer to jobs at other factories, such as GM's Flint, Michigan, truck plant where heavy duty pickups are built and the Toledo transmission plant in Toledo, Ohio. Another 1,200 workers in that group are eligible for retirement, the company said.The US plants GM is shutting down are in Michigan, Ohio, and Maryland. These plants mostly made sedans, which have fallen out of favor as customers have shifted toward crossover SUVs and trucks.GM also said last month that Canadian workers would be offered jobs at other plants in that country.In total, the company announced it would cut 6,000 hourly and 8,000 salaried positions. In October, the company offered voluntary buyouts to 18,000 workers.GM CEO Mary Barra has said she wants to save money and reposition the company for future investments in autonomous driving technology and electric cars. She wants to do this now, she has said, rather than waiting and cutting jobs during an economic crisis."Today, we have a plan for the majority of employees currently working at our impacted plants in Maryland, Michigan, Ohio and Oshawa, Canada that includes job opportunities at other GM facilities," Barra tweeted Friday. "We're committed to doing the right thing, for the future of GM and our people." 1901

来源：资阳报