Things have moved on apace, it's easy to forget that a couple of weeks ago we were all congregating, brushing shoulders in supermarkets that had shelves fully stocked etc. So it's a bit out of order to claim that folk who were out of the country (could also be on business or holidays longer than 2 weeks) should have known what was to come. Even governments with their scientific advisors didn't really know that a few weeks ago and if they did, most weren't being fully open about it, so go easy on those poor folk that were away when it started to ramp up. Many may also not have had the financial flexibility to change their travel plans.