Boris Johnson Stable, Responding to Virus Treatment: Downing Street

Britain's Prime Minister Boris Johnson, Chris Whitty, Chief Medical Officer for England and Chief Scientific Adviser to the Government, Sir Patrick Vallance, arrive for a news conference on the CCP virus, in London, Britain March 3, 2020. Frank Augstein/Pool via Reuters

UK Prime Minister Boris Johnson is in stable condition in an intensive care unit and is responding to treatments for the CCP virus, Downing Street said late Tuesday.

Johnson, 55, is one of the highest profile patients in the world. He was taken to an intensive care unit (ICU) on April 6 after his condition rapidly worsened.