Britain has ordered 40 million doses of Pfizer's COVID vaccine, with hospital staff preparing to administer it to those most at risk by December.
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"I believe that the good news of the vaccine, that it's coming, should not relax the caution that everybody is taking," said Albert Bourla.
The move comes after Pfizer-BioNTech claimed their vaccine is 95 percent effective in preventing COVID.
The huge volume of COVID-19 vaccine doses needed to combat the pandemic will require speedy, precise handling in the U.S. and worldwide. Failure to meet stringent handling requirements means the vaccine, like spoiled lobster, will go bad and must be thrown out.
"[The vaccine] is not a silver bullet. What we need is we need surveillance to be stronger, we need public health measures," Moderna CEO Stéphane Bancel said on Thursday.
The race to a COVID-19 vaccine was also compared to the brutally awkward scene in "Bridesmaids" where Kristen Wiig and Rose Byrne try to outdo each other at Maya Rudolph's engagement dinner.
Promising coronavirus vaccine candidates have surfaced this month as the virus continues to surge across the U.S. Behind the scenes, distribution deals have already been made.
Rick Bright hailed the "remarkable effectiveness" of the vaccine as Pfizer said no serious side effects were reported in a large trial.
Pfizer-BioNTech and Moderna have both recently claimed that their COVID vaccines are more than 90 percent effective in preventing the disease.
In a Gallup poll, 58 percent of Americans said they would accept an FDA-approved COVID-19 vaccine if it were available at no cost.
The key member of the White House Coronavirus Task Force said that new COVID-19 infections "are going to go up" further over the next several weeks.
New York state Senator Brad Hoylman, a self-described "pro-vaccine legislator," encouraged people to get vaccinated against COVID-19 so others are protected.
"The data are striking, they're really quite impressive," Fauci said.
Moderna reported its vaccine is over 94 percent effective, in contrast to the 90 percent claimed by Pfizer.
The announcement comes after Pfizer and Russia institute said their vaccines are 90 percent and 92 percent effective respectively.
Uğur Şahin believes the experimental vaccine, said to be 90 percent effective, will end the COVID-19 pandemic.
More than 782,000 people in the U.K. have lost their jobs during the pandemic and economists warn "we're not out of the woods yet".
With millions still out of work, and companies in badly-hit sectors floundering, the mood in the market is mixed.
The data released by Pfizer was delivered in a news release and the initial finding of more than 90 percent efficacy could still change.
Trump administration officials and allies have tried to link Pfizer's claims that its coronavirus vaccine is 90 percent effective to Operation Warp Speed.
Pfizer and German company BioNTech SE on Monday announced a vaccine candidate for COVID-19, which the world has been battling since early this year. The companies said BNT162b2 has proved successful in the first interim analysis from the phase three study.
There are currently 47 vaccine candidates under clinical evaluation worldwide, while 155 candidates are at the pre-clinical evaluation level.
The president's daughter defended Operation Warp Speed, saying that Pfizer's vaccine was a participant in the administration's program.
"This is when science brought it to us," Pfizer's Albert Bourla said.
CEO Albert Bourla told CBS News in September that he wanted to "liberate" scientists from bureaucratic limitations and keep the company "out of politics."
"We absolutely cannot rely on this as a solution. The biggest mistake we could make now would be to slacken our resolve at such a critical moment."
Memes featuring various celebrities, including Kanye West and actors from the "Lord of the Rings" film trilogy, have surfaced across social media following the latest news.
The vaccine has been deemed to be more than 90 percent effective, according to early data from Pfizer trials.
"The full data set on which the claim is based has not yet been released and so we don't know exactly what has been found," one immunologist said.