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Passengers must have a negative PCR or antigen test within 72 hours of boarding a flight from the UK to the United States. Travelers are required to provide a hard copy or electronic transcript of their laboratory results.
Airlines are required to confirm test results prior to flight, and they will not allow passengers to board if they refuse the test or do not provide documentation.
“President Trump issued a presidential proclamation on March 14 to suspend the entry of foreigners visiting the United Kingdom over the past 14 days,” the CDC said in a statement. “This has reduced air travel from the UK to the United States by about 90%. The need for this additional test will strengthen our security to improve the health and safety of the American people and ensure responsible international travel.”
The company said the order would be signed on Friday and would take effect on Monday.
The CDC said Tuesday that genetic sequencing efforts in the United States have not identified the UK corona virus variant. But that may be because the US watchdog does not like it.
“It could be in the United States and we would not have discovered it yet,” Assistant Secretary of Health Admiral Brett Giorgio said Monday.
Fossie says the rating for herd immunity may be high
More than one million people in the United States have received the first dose of the Govit-19 vaccine in the past 10 days. But hundreds of millions more will have to be vaccinated to reach the herds’ immunity and eventually stop the spread of the virus.
“It’s totally an estimate,” Fassi said. “I don’t want anyone to go bunkers better than this. These are all ratings.”
At the top end of that estimate is 70-75% of people who should be vaccinated, which is higher than Fucci’s previous estimate.
Several factors go into estimating what percentage of the population should be vaccinated to achieve herd immunity, including the rate at which the virus spreads and the effectiveness of the vaccine.
Fassi, director of the National Institute of Allergy and Infectious Diseases, said his assessment was “developed for no great reason”. He said his latest estimate was that about 90% of vaccines are needed to control the spread of measles.
“I’m getting rid of measles, which is 98% effective vaccine,” Fucci said. “But (measles) is such a miraculously contagious disease – more contagious” than the corona virus novel.
The Madrona and Pfizer vaccines are 95% effective against the corona virus.
“There will always be a debate about 60-70 per cent on the topic of (on) hearing immunity,” Sahin said. “But if the virus becomes more efficient at infecting people, we may even need a higher vaccination rate to ensure that normal life can continue without interruption.”
“But 60-70 per cent of the vaccine rate will actually change the situation dramatically,” Sahin added. “We don’t have to deal with outbreaks if the virus is very effective, but it will provide more or less normal life.”
CNN’s Fred Pleitzen and Mary Ilyushina contributed to the report.
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