Lol, covid is been managed by the state level in Brazil. The worst states in covid cases and deaths are the ones that are left-leaning and have the hardest lockdowns. This is the worst take I've seen in this website by far
> The shock of the second wave is changing people’s behaviour. Governors and mayors are now tightening restrictions and people are obeying them more. From March 22nd a nightly curfew in Bahia begins at 6pm rather than 10pm. Bahians have recently cut in half the distance they travel, according to mobile-phone data. This is slowing covid-19’s spread. Dr Vilas-Boas estimates that the number of active cases in Bahia has dropped from 21,000 to 17,000. The number of patients waiting for beds in icus fell from 513 on March 12th to 280 ten days later.
Emphasis added.
[...]
> There's no evidence that the virus that causes COVID-19 spreads through swimming pools, hot tubs and water playgrounds.
https://www.mayoclinic.org/diseases-conditions/coronavirus/e...
Less snark, more substance next time, please?
I suggest you read more closely. There are multiple references to interventions at the state level in the US.
BTW, how would you ethically design a study like this including a control group?