I think my math(s) is pretty solid, actually!
The recent random-sample antibody study in NYC:
The state's mortality rates remains persistently high at about 7.4%. The antibody testing indicates the actual death rate may be far lower.
www.cnbc.com
Concluded 2.7 million New Yorkers have had the virus.
From the worldometers site for the 23rd
New York State Governor Cuomo said that preliminary findings from an antibody study conducted on 3,000 people at grocery stores across New York State found a
13.9% had coronavirus antibodies, suggesting a 13.9%
actual infection rate statewide (
21.2% in New York City), which translates to an estimate of about
2,700,000 actual cases in New York State (
10 times more than the about 270,000
cases that have been detected and reported officially). Governor Cuomo acknowledged that the official count reported by New York State (which still is not including probable deaths as recommended by the new CDC guidelines) of about 15,500 deaths is "not accurate" as it doesn't account for stay at home deaths. Based on Worldometer's count (which includes probable deaths reported by New York City) of about 21,000 deaths and the 2,700,000 case estimate from the new antibody study, the actual case fatality rate in New York State could be at around 0.78% [
source]
But I disagree with their 0.78% figure, because, as I've said a few times here now, you surely have to take into account the lag from infection to outcome. That's about 2-4 weeks to recovery or death. Thus you'd have to take as the numerator not the death count at the time of the prevalence study but the death count maybe 3 weeks later. Because otherwise you are assuming everyone still infected is going to recover, which is not very likely.
That, by my guestimation, would give you more like 1.1% death rate.
Though, then you'd have to somehow allow for the fact that according to the excess death information given here (which I think I only saw after posting the post you reply to)
Far more people died in 2020 during the pandemic than have been officially reported, a review of mortality data in 35 countries shows.
www.nytimes.com
NYC deaths are actually probably about 25% higher than those reported.
Then you'd have to allow for the fact that the infection prevalence study was biased because it only considered those out-and-about, who were probably more likely to be infected than those holed up indoors for the duration. Which would make the denominator a bit smaller than the study found.
So, the best guess, I think, would be somewhere around 1.5%. But it's still only an educated guess, because so much of the data is still rather weak.
Edit - weird that you replied to Jaskalas but used my 1.1% rather than his 1%. I'd actually revise my answer to 1.5% or even a bit higher, in the light of the NYT data about uncounted deaths.
It's also true that the death rate would be higher if the virus were allowed to run amok, due to the medical system being overwhelmed.