https://www.businessinsider.com/coronavirus-boris-johnson-admitted-hospital-coronavirus-symptoms-tests-aides-worried-2020-4

UK Prime Minister Boris Johnson will remain in hospital "as long as necessary" on Monday after being admitted on Sunday for "persistent symptoms of coronavirus." Johnson tested positive for the coronavirus 10 days ago and continues to experience a high temperature and a cough.

He was reportedly treated with oxygen after arriving at St Thomas' Hospital in London on Sunday night. Aides reportedly had become "increasingly worried" about his health because of his appearance and symptoms.

Johnson was "more seriously ill than either he or his officials were prepared to admit," according to the Guardian, which reported a source suggesting Johnson "was being seen by doctors who were concerned about his breathing." Downing Street would not comment on whether he was suffering from pneumonia.