Just to circle back around to this for a minute...
San Francisco doesn't have the lowest mortality rate of major US cities, let alone by an order of magnitude.
SF has had 696 deaths, which is a mortality of
79.4 per 100k. Even the worst cities aren't an order of magnitude worse.
NYC has had 36,949 deaths and a mortality of
417.5 per 100k, which is only ~5x that of SF.
Fresno has had 2,415 deaths and a mortality of
438.9 per 100k, right around the same ~5x. And those are some of the worst cities in the US for COVID mortality.
But yeah, SF isn't even the lowest.
Seattle has had 544 deaths, which is a mortality of
70.4 per 100k and is about 9% lower than SF.
Even during the delta/omicron surges, the two cities are pretty much neck-and-neck. Since 7/1/2021, just before the start of the delta surge, SF has had 129 deaths (
14.7 per 100k) and Seattle has had 116 deaths (
15.0 per 100k). Seattle was a bit lower during delta, but a bit higher since omicron started surging.