British Prime Minister Boris Johnson has been admitted to hospital for tests due to persistent coronavirus symptoms, his office said Sunday."This is a precautionary step, as the prime minister continues to have persistent symptoms of coronavirus 10 days after testing positive for the virus," the prime minister's office said in a statement.On March 27, Johnson said he had tested positive for coronavirus. He said on Friday he would continue to self-isolate with a high temperature.Queen Elizabeth offered a message of reassurance Sunday evening, calling on British people to act with "self-disci…READ FULL ARTICLE