The Mayo Clinic Health System team looked at more than 311,000 people in four states who received at least one dose of the vaccine – and their vaccines were found to be more than 0% effective in preventing infection 36 days after the first dose.
The effectiveness of vaccination was 75% 15 days after the first dose, and 89% effective 36 days after the second dose, according to research, which has not yet been peer-reviewed.
U.S. Department of Disease Control and Prevention So far, U.S. More than 59 million vaccine doses have been given.
But Dr. Christopher Murray, director of the Institute for Health Metrics and Evaluation at Washington University in Washington, D.C., said Friday that U.S. The herd is unlikely to be immune to the virus before winter.
He said, “We know Covid is really seasonal, so when next winter comes around, we should be more likely to stop Covid in his tracks than we can achieve.”
By infection or vaccination, herd immunity will not be effective until 80% or more of the population is immune. And new types can complicate the picture, Murray said. If people can be re-infected with new variants, the epidemic can stop again.
Officials expect the vaccine to be widely distributed by the end of the summer, although President Biden said Friday that issues such as weather, changing tensions and delays in production make it difficult to tweak the timeline.
Giving a single dose is very dangerous, says Fausi
Some experts suggest that one way to save more people quickly is to administer the first dose of the vaccine.
“Would that really be a problem, because if we could do that, we could vaccinate people at much higher risk quickly … everyone needs a different dose, but I think we can do it the way we have yet Is safe and “get more people safe,” Zay told CNN’s Poppy Harlow.
But Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, said Friday that a single dose plan would be too risky.
Fawcett said he was concerned that if a large number of people received a single shot and received less response than the best immune response, they could be exposed to the virus and start a viral mutation. In theory, new variables could emerge, he said.
“We will stick with the scientifically documented effectiveness and the PM’s excellent response to the promotion with the mRNA vaccine,” Foi told the White House in a briefing.
“I agree that everyone needs a second dose,” Zhae said for his part. “I think the question is, right now we have to wait four weeks between the first and the second dose. If we go six weeks or eight weeks or 10 weeks. – So what? Longer than that. “
The CDC director says the school could reopen due to the spread of the virus
Hoping to return to a sense of a little normalcy, the priority of many families and officials is allowing students to begin studying individually.
And Dr. Rochelle Valensky, director of the CDC, said Friday that with due diligence, schools will open up no matter how much the virus spreads in the community.
As of Tuesday, CNN analysis suggests that about 90% of children live in the so-called red zone under the guidance of the CDC – meaning there is a high level of community spread of the virus. “Even in this situation, schools can safely reopen if they are careful,” Valensky told the White House in a briefing.
The CDC has said it will reopen schools if it ensures the risk of spreading from the use of universal masks, measures to keep children and staff six feet away, frequent cleaning and disinfection and testing and contact tracing.
With the assurance of the CDC director, the FC announced that the U.S. Must have vaccine safety data for high school-age children by the beginning of the fall.
Companies are starting testing not only for younger age groups, but also testing their vaccines on children aged 12 to 17, Fawcett told the White House in a briefing. Safety data for young children will not be available until early next year, he said.
Vaccine hesitation is not an excuse for inequalities
Meanwhile, vaccine tests and distribution have highlighted disparities in the medical field.
Over the past decade, people of color have been heavily represented in US-based vaccine tests, according to a new study released Friday by researchers from the Fred Hutchinson Cancer Research Center, Harvard, Emory and other organizations.
The study found that whites had a majority or% participants in experiments conducted between June 2011 and June 2020.
The study, published in the JMA Network Open, has sparked a nationwide outbreak of an epidemic that has disproportionately affected people of color. Health care leaders are working to combat vaccine distrust among black and brown people, saying the shots are the key to preventing more devastation in their communities.
Fossey said there should be no excuses for officials to address racial disparities in vaccinations.
“It’s because we’ve really extended ourselves into the community to get access to the minority population,” Fawcett said in an interview with MSBC.
CNN’s Christopher Rios, Amanda Seeley, Lure Ren Mascarenhas, Kevin Liptak, Maggie Fox, Nicholas Neville and Nicwell Terry Ellis contributed to the report.
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