"It is safe to be immunized after having been exposed to the virus," Moncef Slaoui said.
Matt Hancock named other countries, including Australia, as places where the new strain had been found.
The data journalist called it "pretty embarrassing" for such public health professionals that it was "largely outsiders like" him and other journalists, who had flagged concerns with a recent report.
Brazilian President Jair Bolsonaro has reportedly claimed that the Pfizer/BioNTech COVID-19 vaccine could result in several strange side effects, including people turning into "crocodiles" or becoming "superhuman."
Slowing infections within prisons will reduce disease both inside and in the surrounding communities.
Vaccine providers should observe people with a history of anaphylaxis—a severe, potentially life-threatening allergic reaction—due to any cause for 30 minutes after the individual receives the shot.
The nurse, who has a condition that often causes her to faint when she experiences pain, recovered quickly.
Sites that administer coronavirus vaccines are equipped to deal with these cases, said Alaska's Chief Medical Officer Dr. Anne Zink.
About 2.9 million doses of the Pfizer/BioNTech coronavirus vaccine will be distributed across the country this week.
"Although it might seem counter-intuitive, from a research ethics viewpoint, this is a success," said researcher Diego Silva.
The head of the National Institute of Allergy and Infectious Diseases said it will take a while to achieve herd immunity if a substantial proportion of the population is not vaccinated.
China's Communist government has agreed to share its COVID vaccine and research with some developing countries, leading some to mistrust its motives.
Dr. Moncef Slaoui's comment comes ahead of a vaccine summit to be held Tuesday at the White House where the executive order will be discussed.
The company has entered into agreements to supply other countries since it reported promising results for its vaccine contender, Scott Gottlieb, the head of the Food and Drug Administration (FDA) said.
Since vaccines work by building herd immunity, a refusal to vaccinate among large segments of the population would deal a serious blow to any disease control strategy.
Three Indian-made COVID-19 vaccines are currently at different stages of clinical trials.
China currently has five coronavirus vaccines undergoing large-scale, Phase III clinical trials.
The U.S. is in the jarring position of smashing records for COVID deaths and hospitalizations amid promises that vaccines are weeks away from being gradually rolled out to those most at risk.
Hospitalizations for the new coronavirus have surpassed 100,000 nationwide as public health experts predict the situation will worsen in the coming weeks.
The rise also occurred as Trump continued to make unproven allegations of widespread voter fraud that, he says, cost him the election.
"The speed of development for this and other vaccine candidates is testament to an extraordinary, collaborative, global research effort," said Charlie Weller from the Wellcome Trust.
The U.K.'s health secretary said the country will be ready to start vaccinating people from early next week.
"African Americans have suffered disproportionately from coronavirus disease," Dr. Anthony Fauci said in June.
Chartered United Airlines flights have begun landing in the United States with officials planning to distribute millions of doses if it is given approval by regulators, the Food and Drug Administration (FDA).
Close scrutiny continues long after a product has been approved by regulators, even in a public health emergency.
"We'll turn the corner on COVID in 2021 with the help of our technology," Scott Gottlieb said.
Experts are urging the public to be informed that promising new COVID-19 vaccines that may soon be available could provoke severe, but temporary, side effects in some who receive them.
"We have a vaccine for the world," said Professor Andrew Pollard from the University of Oxford. So, how does it compare to other contenders? What are its other advantages? And who might get it first?