Coronavirus has landed within the UK with two cases confirmed. The pair, believed to be two Chinese tourists, were dramatically evacuated by hazmat medics from a York hotel two days ago. they're believed to be being treated in Newcastle. It comes as evacuated Brits landed on a chartered flight form Wuhan at RAF Brize Norton. Professor Jonathan Ball may be a molecular virologist at Nottingham University. Here he explains the coronavirus' spread and the way people can protect themselves.