I agree, though in Michigan, the higher case counts are certainly resulting in increased hospitalizations as well.
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Data source https://beta.healthdata.gov/dataset/COVID-19-Reported-Patient-Impact-and-Hospital-Capa/6xf2-c3ie
FLorida, on the other hand, and this could be a direct result of vaccination focus
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Though I'm sure someone will just say it's a result of how FL reports their data to the feds.
It's largely seasonality which has proven to be fairly strong with Covid. Recall -- Last March / April were bad in New York, Michigan...... the same places it is bad now.
Meanwhile, the South... Florida / Texas... barely got touched last March / April, they had their first big waves in summer, August largely.
The exact reasons for the seasonality influence aren't clear. But the working hypothesis is that March / April, in the north -- these are "active" months but people are still largely indoors. In the south, these are the more comfortable months to be outdoors.
Summer... in the north, people head outdoors a lot more. Summer in the South -- people head indoors into air conditioning a lot more.
And yes, there are some reporting issues, but those aren't the primary drivers of the differences. We are seeing a pretty clear pattern -- the areas hit hard last March / April, are seeing rises again. The places that had it pretty mild last Spring, are again mild.
If it weren't for the increasing vaccinations, cases would likely be totally exploding in the North, instead of just mild increases / plateau.
And cases would likely explode in the South this summer -- but by then, hopefully we will have enough vaccinated, that no such explosions occur.