Chart from John Hopkins. You'll see that daily percentage increases in cases in decreasing, and this is despite there being more testing. Exponential growth means a 100 percent increase again and again and again until everyone is infected.
https://www.zerohedge.com/s3/files/i...?itok=5EY15fSK
That said, yes, everyone/majority will get infected by this disease. We've all had the common cold and flu, but it'll probably take years. But I'm doubtful it's going to happen in 6-12 month time frame.
Covid-19 isn't THAT transmissible.
That's a pretty low number that will guard against a "runaway scenario." There's certain areas prone to be runaway, like New York, because they're forced into more enclosed spaces due to population density and much more reliance on mass transit, but most of the country isn't built like New York.
Then there's the prospect of warmer weather slowing virality down, which will further reduce the probability of a runaway scenario. Sure you already saw my post, but here's the findings from the University of Maryland.
https://www.medschool.umaryland.edu/...to-Thrive.html
That said, yes, places like New York are particularly vulnerable. They check all the boxes. High pop density, mass transit system, climate conducive to spread (remember, their flu transmission rate is 4.2x higher than Texas and California), probably resemble Italy to an extent where multiple generations of family live under the same roof, especially Italian Americans and such.
And yeah, even ideal areas where the virus won't spread much might get overwhelmed, but it'll be because of an insufficient healthcare system. The scenario I don't buy is 200 million infected and 1 million dead in a year. This is a stronger flu on top of the regular flu, and that is a problem in of itself.