@Roussette
How can you compare when UK is same size as just one US state, we're a bit cramped here! Also Spain... vast compared to us. More than twice as big area wise, and 16million less people. Only 60 less deaths per 1M pop there, hardly surprising given our size and population within it.
(Disclaimer, our figures in UK are shocking but we have to put it into perspective)
If you are masked (and masks works), social distancing, and practicing proper hygiene (like wiping surfaces), then why would population density matter? But let's play your game regardless:
UK vs other countries:
Netherlands: 421/km^2, 358 deaths/1M pop
Israel: 418/km^2, 48 deaths/1M pop
Belgium: 376/km^2, 846 deaths/1M
UK: 280/km^2, 671 deaths/1M pop
Germany: 233/km^2, 110 deaths/1M pop
Switzerland: 208/km^2, 228 deaths/1M pop
Compared to the Netherlands, UK has 0.66x of the population density, but has nearly 2X times the number of Covid deaths. I've been told by some Dutch friends that masks are not prevalent there and are only required on public transportation. (I don't know how true his claim is.)
Compared to Belgium - Belgium has 1.34x the population density as the UK, but only 1.26x the death rate. No reason to compare Israel against anyone, they've done better by leaps and bounds.
Now let's circle back to Los Angeles county, the population density is:
800/km^2. Covid deaths: 4262 deaths as of today (source corona-virus.la/ ) 10M people living in the county.
That results in: 426 deaths/1M people
So Los Angeles County is almost 3 times as dense as the UK, but has only 0.63x the covid deaths.
Hmmmm ...