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British Prime Minister Boris Johnson could need to recuperate for several more weeks before he returns to work after battling the coronavirus, according to a new report.

A source at No. 10 Downing Street, Johnson’s official residence and office, told the Sun that the prime minister is “only just beginning his post-hospital recovery.

“It’s just too soon to give an indication on timing,” the source added. “He has been told he needs to rest and recover.”

Johnson was discharged from London’s St. Thomas hospital on Sunday, a week after he was admitted for coronavirus, Downing Street announced.

But Johnson’s office said he will not immediately return to work and will recover at Chequers, the prime minister’s official country residence north of London.

He said in a video posted to Twitter that the country’s National Health Service “has saved my life, no question.”

British Health Secretary Matt Hancock also heaped praise on the staff who treated Johnson.

“I know they have cared for him as they would care for anybody in this country,” Hancock said, according to the Sun. “It’s one of the things that makes me so proud.”

Johnson, 55, was admitted to the hospital April 5, nine days after he announced he had been diagnosed with COVID-19.

The next day, the prime minister was transferred to the intensive care unit, where a ventilator was available if he needed one. Officials said he had been able to breathe on his own.