The US Food and Drug Administration on Monday gave full approval to the COVID-19 vaccine made by Pfizer and German partner BioNTech for use in people over the age of 16.
It's the first such approval of a COVID-19 shot.
The vaccine has been authorised for emergency use since December and more than 204 million people in the United States have received it, based on Sunday's data.
But none of the three authorised COVID-19 vaccines had previously received full FDA approval.
Public health officials hope it will convince more unvaccinated Americans that Pfizer's shot is safe and effective.
Vaccine hesitancy among some Americans has hindered the United States response to the novel coronavirus.
"While millions of people have already safely received COVID-19 vaccines, we recognize that for some, the FDA approval of a vaccine may now instill additional confidence to get vaccinated," said Janet Woodcock, the US Food and Drug Administration's acting commissioner.
Roughly 51 per cent of Americans have been fully vaccinated so far, even as a recent surge of infections spurred by the contagious Delta variant ravages parts of the country with low vaccination rates.
Zohran Mamdani, a 34-year-old democratic socialist, won the New York City mayoral race on Tuesday, capping a meteoric rise from a little-known state lawmaker to one of the country's most visible Democratic figures, and the first Muslim mayor of the largest US city.
At least 58 people were dead after Typhoon Kalmaegi left a trail of destruction in the central Philippines and continued to batter parts of Palawan island on Wednesday as it headed toward the South China Sea.
At least four people were killed and 11 others injured after a UPS wide-body cargo plane crashed and erupted into a massive fireball shortly after takeoff on Tuesday from Louisville, Kentucky, authorities said.
Dick Cheney, a driving force behind the US invasion of Iraq in 2003 who was considered by presidential historians as one of the most powerful vice presidents in US history has died at age 84, his family said in a statement on Tuesday.
UAE President His Highness Sheikh Mohamed bin Zayed Al Nahyan has led the messages of condolences sent to the family of Dick Cheney, former Vice President of the United States, following the announcement of his passing.
The UAE has welcomed the commencement of implementing the peace agreement between Thailand and Cambodia that was previously signed in Kuala Lumpur, Malaysia during a summit of the Association of Southeast Asian Nations.
His Highness Sheikh Hamdan bin Mohammed bin Rashid Al Maktoum, Crown Prince of Dubai and the UAE's Deputy Prime Minister and Defence Minister, has approved new plans and policies aimed at making Dubai one of the world’s most beautiful, livable and healthiest cities.