I think the virus is already here and many of us have already been affected.
The advice given to us seems very bizarre and narrow minded. The initial advice was over people who had travelled to Wuhan/China, but no one appears to have considered that, prior to the Wuhan lock down, Chinese people who were possibly already infected also travelled to Europe and Britain.
The parents of one of my neighbours, who has been very ill over the past fortnight with a dry cough and chest pain and her mother feeling very ill with a dry cough, hadn't travelled to China or Italy or Iran, but her parents had gone on a cruise in late January with Chinese passengers on the same ship. I suspect they all may have/had Covid-19, but, obviously, they became poorly before the alerts and none of them travelled to China. China, instead, came to them, iyswim.
And the advice we've got locally is appalling, along the lines of "if you have a cough, call 111." When we asked the advisor about how people would personally assess whether their cough was a coronavirus cough or a different virus cough, there were just blank looks. How are people supposed to determine whether they should self-isolate?
It's all so woolly and not properly thought through.