I know you don't like it. But it is what the models say.So despite everything that happened in California, despite everything that happened in Europe, despite the praise leaped on the Czech Republic for its early mask adoption, we're back to the entire masks can control the pandemic thing. Incredible. Mind officially blown.
p.s. your avatar is supposed to be something derogatory, not some cool thing you like. What is a character that sees everything blowing up around him, and is just all "world's fine...it's cool". The only thing I can think of is that dog meme with the fire burning around him.
A 70% reduction in transmission is enough to reduce R below 1.
Most research shows that masks provide at least a 70% reduction, especially if you also close indoor dining.
However, if you only have 85% compliance, you still have an outbreak, because you still get R>1.0.
That seems to be what happened both here and later in Europe. At least 15% of people skipped masks and kept gathering, and that was enough to let covid keep growing.
You can learn from it, or not.
But ignoring it doesn't make it not true. Non compliance with masks and gatherings is a major factor in covid spread.
Yo, Jimbo
(As I said, I don't like insults. The whole Magoo thing is childish and annoying. Espola isn't blind or unaware of the world around him. You just don't like what he says. It no more thoughtful than EOTL's "Grace Karen" nonsense.)