> Combined with a long transmissable dwell
time before symptoms, wouldn't surprise me
if 90%+ of the people in NYC were
materially exposed.
Looks like you have a possibly important
point:
If so, then they would be well on the way
to herd immunity and, thus, essentially
at the end new cases and the end of the
epidemic.
So, for your point, at
https://www.breitbart.com/politics/2020/04/23/andrew-cuomo-1...
is in part:
"Andrew Cuomo: 13.9% of New Yorkers
Tested Positive for Coronavirus
Antibodies; 21% in NYC"
The 21% is huge.
So, it looks like the virus spread much
faster than symptoms indicated and now
ballpark 1/4th NYC has been "exposed" to
the virus and is either infected without
symptoms or recovered without ever having
significant or any symptoms. Amazing.
So, if want to accept the usual situation
for viruses, then the 1/4 of the
population soon can't get or transmit the
virus.
Ah, but wait; there's more:
As at
https://www.msn.com/en-us/news/us/in-four-us-state-prisons-n...
is, call it an exploitation of
a captive audience,
> When the first cases of the new
coronavirus surfaced in Ohio’s prisons,
the director in charge felt like she was
fighting a ghost.
> “We weren’t always able to pinpoint where
all the cases were coming from,” said
Annette Chambers-Smith, director of the
Ohio Department of Rehabilitation and
Correction. As the virus spread, they
began mass testing.
> They started with the Marion Correctional
Institution, which houses 2,500 prisoners
in north central Ohio, many of them older
with pre-existing health conditions.
After testing 2,300 inmates for the
coronavirus, they were shocked. Of the
2,028 who tested positive, close to 95%
had no symptoms.
> “It was very surprising,” said
Chambers-Smith, who oversees the state’s
28 correctional facilities.
and the article has more such data.
Then if want to accept an estimate that
50% of the population immune means herd
immunity, NYC is ballpark half way to
herd immunity which would be close to
the end of the epidemic. E.g., even
people in NYC so far never exposed to the
virus would not get infected even from
infected new arrivals before they were
recovered or dead.
So, a guess is that the virus SARS-COV-2
is very strange in two respects: (1) It
is astoundingly communicative, that is,
spreads very easily and (2) has some huge
fraction of people with the virus but
without symptoms.
A guess at an explanation: In NYC, the
virus was often getting spread just via
the air, e.g., via building central HVAC
systems?
The good news, if want to believe all such
evidence and related common assumptions,
is that we can get to a fraction of the
population with immunity large enough to
have herd immunity and, thus,
essentially be well on the way to the end
of the epidemic, all surprisingly quickly.