Less dense city. As someone who lived in both places LA and SF are not nearly as dense. You could say the same about 90% of the US. 50%-60% of the case are in NY daily
SF isn't as dense as NYC, but it's still pretty dense in places. For example, the Tenderloin has ~71,000 people per square mile. [1] That's a lot of people in small area compared to just about anywhere else.
Yeh but having small pocket and having an entire city is different you can do something about the pocket by making less dense places a little more dense for a while. You can't do that with NYC. It's like a heat map. You can distribute one hot zone but not a map filled with hotzones.
