US President Donald Trump said late on Monday that he was saddened to hear that British Prime Minister Boris Johnson had been moved to an intensive care unit after his coronavirus symptoms worsened and that Americans were praying for his recovery.

Trump was the latest of a number of world leaders to send good wishes to Johnson, 55, who was admitted to a hospital in London on Monday night, after suffering persistent coronavirus symptoms, including a high temperature, for more than 10 days.

Earlier on Monday, French President Emmanuel Macron said he was wishing that Johnson would “overcome this ordeal quickly.””All my support for Boris Johnson, his family and the British people at this difficult time,” Macron said.

Canadian Prime Minister Justin Trudeau also said he wished “for a full and speedy recovery” for his British counterpart. “My thoughts are with you and your family right now. Hope to see you back at Number 10 soon.”

The British prime minister’s office had said Johnson was in good spirits and still in charge, though his condition deteriorated in the early evening on Monday, and he was transferred to an intensive care unit – where the most serious cases are treated – at St Thomas’ Hospital in London. Johnson had reportedly received oxygen, a source told Reuters news agency.