Joe Biden has received his first dose of the Pfizer Covid-19 vaccine live on TV.
The president-elect said he was getting the vaccine to show Americans it is “safe to take”.
Joe Biden joins a growing number of political leaders getting the jab, including VP Mike Pence and House Speaker Nancy Pelosi.
On December 20, the roll-out began for a second vaccine, by Moderna, which was approved last week.
More than 500,000 Americans are said to have now been vaccinated.
Joe Biden said from Newark, Delaware, where he got the vaccine live on TV: “I’m doing this to demonstrate that people should be prepared when it’s available to take the vaccine.
“There’s nothing to worry about.”
The president-elect said the Trump administration “deserves some credit” for launching the country’s vaccine program.
His wife, Jill Biden, received her first dose earlier in the day, the president-elect said.
Joe Biden’s running mate, VP-elect Kamala Harris and her husband Doug Emhoff are expected to receive their first shots next week.
The Biden team has set a goal of 100 million Covid-19 vaccinations during the administration’s first 100 days in the White House.
During the pandemic, the US has recorded more than 18 million cases and 319,000 deaths.
President Donald Trump, who spent three days in hospital with the coronavirus in October, has not said when he intends to get the vaccine.
He is now one of last of the country’s top elected officials to have not received the first of the course of two jabs.
President Trump wrote in a December 13 tweet: “I am not scheduled to take the vaccine, but look forward to doing so at the appropriate time.”
Some of the president’s advisers have defended the delay, saying he is still protected by the treatments he received to beat the virus.
According to the CDC, roughly three million doses of the Pfizer vaccine have been shipped and more than 500,000 Americans have been vaccinated so far.
On December 20, distribution of the Moderna vaccine began in the country too, with some six million vaccine doses available for immediate shipment.