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Two things being conflated on the question of whether rallies (right or left) can spread COVID. Yes these rallies are dangerous to go to, doesn't matter if you have a cloth mask on standing shoulder to shoulder. Two, the reason there is no large uptick from them is interesting.
The best study I've seen on rallies/COVID suggested the reason they didn't lead to a net increase in cases is because *so many people stayed home to avoid the rallies* https://www.nber.org/system/files/working_papers/w27408/w27408.pdf
So these large protests you're seeing in the US, EU, other places do carry dangers. The fact that net number of cases hasn't gone up as a result does not mean the rallies themselves aren't a danger for people who attend them. That's not what the science shows.
There is a lot of innumeracy in the way this stuff is reported in the media but the basic fact is standing very close to people who are yelling in dense environments, even outside, even with a mask on, still carries dangers and is still a risk.
