I was reading about how one of the reasons coronavirus spreads so quickly and easily is that it's not particularly deadly or even debilitating. Young people get it, assume they have the cold or the flu - or sometimes feel no symptoms at all - and continue their plans and travel around. They tested everyone on that cruise ship and lots of people had it - even though they all felt fine. If they were just out in the world they wouldn't have even been tested.
That makes containment a lot more difficult. There's a Harvard professor who thinks that 40-70% of people in the world will get the virus at some point, but that most will get only mildly sick, or not notice at all.
Even though they probably under-report things, the fact that we don't have reports of bodies in the streets in China despite how easily this spreads seems to support all that. If China can avoid massive deaths, and there's some indications things are tapering off there, we hopefully will see even smaller death tolls in Europe and North America.
https://www.theatlantic.com/health/a...accine/607000/