Bourla added that the EU's rollout - which has faced criticism for lagging behind countries like the United Kingdom and the United States - shouldn't be compared to quicker vaccination campaigns, saying that "the grass always looks greener in your neighbor's garden".
Even if that protection lasts far longer than six months, experts have said that rapidly spreading variants of the coronavirus and others that may emerge could lead to the need for regular booster shots similar to annual flu shots.
Pfizer CEO Albert Bourla said people who've gotten both doses would likely need a third shot within 12 months and might need an annual shot thereafter.
"It is extremely important to suppress the pool of people that can be susceptible to the virus", he said.
Last month, the National Institutes of Health began testing several versions of boosters from Moderna that could potentially be used to combat variants of COVID-19, including the South African strain that has flummoxed researchers and healthcare professionals since it started spreading.
Speaking to CNBC in an interview aired on Thursday, he said: We need to see what would be the sequence, and for how often we need to do that, that remains to be seen.
While a third booster shot against the virus is not yet required, Moderna has announced it will be ready soon.
Pfizer was first to market in the US with its BioNTech-partnered COVID-19 vaccine, and by and large, it's avoided the safety and supply concerns plaguing some of its pandemic peers.
Among the most vulnerable population - residents 65 years and older - more than 70% have gotten a first dose, and more than 61% are fully vaccinated.
Johnson & Johnson CEO Alex Gorsky told CNBC in February that people may need to get vaccinated against COVID-19 annually, just like seasonal flu shots.
"We don't know everything at this moment", he told the House Coronavirus Crisis Subcommittee. "We are studying the durability of the antibody response".
"I think for planning purposes, planning purposes only, I think we should expect that we may have to boost". But the concern is that in some cases, they are occurring in people infected by more contagious virus variants.
But this needn't be so complicated: Biden ought to just make good on his campaign promise by raising the cap significantly. Biden has not fulfilled his promise to restore America's leadership as a safe haven for the world's oppressed, he added.
Floyd may have been in cardiac arrest there was a time when he may have been revived because he wasn't dead yet?" asked Blackwell. Mr Chauvin, who is white, has pleaded not guilty to murder and manslaughter charges. "The amount of force that was applied to Mr.
More than 14,000 people have died in fighting in eastern Ukraine, and efforts to negotiate a political settlement have stalled. Days after that call, Biden said in a speech before State Department officials that the days of the U.S.
On Friday, the World Health Organisation warned the world was "approaching the highest rate of infection" so far. Coronavirus preparations are being made for another global sporting showcase-the World Cup in Qatar next year.
Family members gathered at a nearby hotel to await word on loved ones - and some employees were bused there for tearful reunions. A man told WTTV that his niece was sitting in the driver's seat of her vehicle when the gunfire erupted, and she was wounded.
A witness who said he works at the facility told WISH-TV media outlet that he saw a man with a gun after hearing several gunshots. The FedEx facility involved is near Indianapolis International Airport, but it is not part of the FedEx hub at the airport.
The man Tehran accuses of being behind the recent explosion at its main Natanz nuclear plant has been named by Iranian state TV. This satellite photo from Planet Labs Inc. shows the Natanz nuclear facility in central Iran on April 7.
His concerns were echoed by Fatima Gailani, one of just four women negotiating with the Taliban for Afghanistan's government. North Atlantic Treaty Organisation announced it would also begin a withdrawal of almost 10,000 troops from the country.
A witness who said he works at the facility told WISH-TV that he saw a man with a gun after hearing several gunshots. She added that President Joe Biden will deliver remarks about the shooting later on Friday.
The breach exposed vulnerabilities in the supply chain as well as weaknesses in the federal government's own cyber defences. The White House is announcing the expulsion of 10 Russian diplomats and announcing a new round of sanctions against Russia.
Potter was an instructor with the Brooklyn Center police, according to the Minnesota Police and Peace Officers Association. City Police Chief Jim Gannon, who also resigned on Tuesday, has said the shooting appeared to have been accidental.
Biden keeps US refugee cap at 15,000 rather than raise it
Hours later, White House spokeswoman Jen Psaki said the president is committed to increasing the cap without specifying a number. Trump had blocked many Muslim and African refugees by prioritizing smaller groups of refugees, like Iraqi Christians.
UK records another 2,596 coronavirus cases, 34 deaths
In the 265 lineages from India , the cumulative prevalence of the B.1.617 variant was 10 per cent, the Scripps researchers found. This is the list of countries which if people have travelled to in the previous 10 days, they're refused entry to the UK.
Expert blames George Floyd’s death on heart rhythm problem
He said Floyd was held faceddown on the ground by Chauvin and other officers next to the exhaust pipe of a running police auto . The South African-born Fowler said Floyd had an enlarged heart and a "significant narrowing of all of his coronary arteries".
Ontario could announce new COVID-19 restrictions Friday
Ford also said enforcement will be ramped up, "We are taking decisive action on the ground to dramatically step up enforcement". Premier John Horgan. "And there is the option for a police officer to issue a ticket", said Jones in a news conference.
Biden-Suga Meetings At White House Set To Focus On China
Biden said they agreed to enhance their support for global vaccination efforts through the ACT accelerator and COVID-19 facility. Biden did not mention Taiwan by name amid concerns from global watchdogs that China may take military action against the island.