Queen Elizabeth holds her first face-to-face meeting after she had Covid.

Queen Elizabeth II met Prime Minister Justin Trudeau of Canada on Monday in her first in-person official meeting after testing positive for the coronavirus last month, giving further reassurance about her recovery.

Queen Elizabeth, 95, first tested positive for the virus on Feb. 20, but only reported experiencing mild cold-like symptoms. Buckingham Palace announced her return to work on March 1.

The palace posted a photograph to Twitter on Monday of the queen, who is also queen of Canada, receiving Mr. Trudeau at Windsor Castle for an in-person audience, or one-on-one meeting.

Some observers on Twitter pointed out that the flowers behind the queen were blue and yellow — the colors of the Ukrainian flag.

In recent days, the Disasters Emergency Committee, which distributes relief money in Britain, thanked the Queen for making a generous donation to their humanitarian fund-raiser for Ukraine.

Mr. Trudeau is traveling across Europe this week to signify Canada’s solidarity with European countries “in the face of Russia’s unwarranted invasion of Ukraine,” the prime minister’s office said in a statement.

On Monday, Mr. Trudeau also met with Prime Minister Boris Johnson of Britain. They were joined by the Prime Minister Mark Rutte of the Netherlands.