UK PM Johnson tells ill people to self-isolate

British Prime Minister Boris Johnson stepped up the response to the coronavirus outbreak on Thursday, moving to the so called "delay phase" which includes the option of more stringent measures designed to slow down the spread of the virus.

''We are now getting onto the next phase," Johnson said.

"This is now not just an attempt to contain the disease as far as possible but to delay its spread." The prime minister advised those with even mild coronavirus symptoms to stay at home for at least seven days to help slow the spread of the virus.

He also told all those over 70 with serious medical conditions not to go on cruises, and advised against international school trips.