Ferrets, monkeys and other animals are helping scientists answer basic questions about the efficacy of experimental COVID-19 vaccines.
Fast forward to the pandemic. Three recently reported studies in monkeys tested different COVID-19 vaccine approaches, including shots made by Oxford University and China’s. The studies were small, but none of the monkeys showed evidence of immune-enhanced disease when scientists later dripped the coronavirus directly into the animals’ noses or windpipes.
Some of the best evidence so far that a vaccine might work also comes from those monkey studies. Oxford and Sinovac created very different types of COVID-19 vaccines, and in separate studies, each team recently reported that vaccinated monkeys were protected from pneumonia while monkeys given a dummy shot got sick.
But protection against severe disease is just a first step. Could a vaccine also stop the virus’ spread? The Oxford study raises some doubt.Those researchers found as much virus lingering in the vaccinated monkeys’ noses as in the unvaccinated. Even though the experiment exposed monkeys to high levels of the coronavirus, it raised troubling questions.
The type of vaccine — how it targets the “spike” protein that coats the coronavirus — may make a difference. Researchers at Beth Israel Deaconess Medical Center in Boston designed six different vaccine prototypes. Some only partially protected monkeys — but one fully protected eight monkeys from any sign of the virus, saidIn monkeys, the new coronavirus lodges in the lungs but seldom makes them super sick.
“Ferrets develop a fever. They also cough and sneeze,” infecting each other much like people do, said vaccine researcher
日本 最新ニュース, 日本 見出し
Similar News:他のニュース ソースから収集した、これに似たニュース記事を読むこともできます。
Monkeys, ferrets offer needed clues in COVID-19 vaccine raceThe global race for a COVID-19 vaccine boils down to some critical questions: How much must the shots rev up someone’s immune system to really work? And could revving it the wrong way cause harm?...
続きを読む »
American Seafoods confirms 86 crew on fishing trawler contracted COVID-19American Seafoods says 86 crew on fishing trawler have contracted COVID-19.
続きを読む »
Why The Covid-19 Pandemic Still Poses Significant Risks For ChildrenDr. Barry Bloom, who has fought infectious diseases around the world, discusses the impacts - both direct and indirect - that the Covid-19 pandemic will have on children around the world if timely interventions aren’t made.
続きを読む »
What wealthy independents, a key swing vote, think about Trump, Covid-19 and the economyMillionaires who identify as political independents are closer to the outlook of wealthy Democrats than wealthy Republicans on several key issues, according to the latest CNBC Millionaire Survey.
続きを読む »
Latino homes report serious COVID-19 symptoms nearly twice as often, survey of 1.6 million showsA survey of 1.6 million U.S. homes shows 1 in 12 Hispanic homes reported serious COVID-19 symptom combinations: dry cough and difficulty breathing or fever and loss of taste or smell. Experts say the data may offer a fuller picture of the virus’ toll.
続きを読む »
Social distancing and masks reduce risk of getting Covid-19, review findsThe 'most comprehensive study to date' found that physical distance and perhaps the use of a mask were the two best ways to prevent transmission of the novel coronavirus
続きを読む »