British Prime Minister Boris Johnson spent the night in the intensive care unit of a London hospital with the new coronavirus, but is not on a ventilator, a senior government minister said Tuesday, as pressure grew on the government to release more details of Johnson’s condition. Johnson was admitted to St. Thomas’ Hospital late Sunday, 10 days after he was diagnosed with COVID-19, the first major world leader to be confirmed to have the virus. He was moved to the ICU Monday after his condition deteriorated.