.66% sounds like pretty good odds, until you take that as a percentage of the US population (330,000,000) and that leaves you with 2.1 million dead Americans. That assumes, of course, that we are all going to get it before a vaccine comes out in 18 months. The current "stay at home" orders are designed to reduce the number of people infected right now, but who knows how many resurgences we will see over the next year and a half.