British Prime Minister Boris Johnson spoke in a video posted to Twitter April 12, after being released from a London hospital where he was treated for covid-19. (Video: The Washington Post)

British Prime Minister Boris Johnson, perhaps the world’s best-known coronavirus patient, was released from a London hospital Sunday, nearly a week after he was admitted to the intensive care unit with complications from the virus.

“I have today left hospital after a week in which the NHS [National Health Service] has saved my life,” Johnson, 55, said in a video statement. “It’s hard to find words to express my debt.”