It was how we got infected in the first place. The writing was on the wall from January 30th and sure enough we now find ourselves in this situation which would have happened anyway even with inbound airport checks. More to the point what happens when we eventually get down to zero cases and the rest of the world still has it? China leads the way with its very restrictive access but some folk think it will all be back to normal in the coming months. Somehow I don't think so.