Look, this is debate over vaccination and infection rates - not on the seasonality of CV-19. But after doing a little research I now get why you are obsessing on it while ignoring the op - apparently Trump mentioned seasonality and ever since then its tainted this subject because, as we know, if trump says the world is more like a sphere than a disk the TDS folk will say Trump is a liar.
So NOW I (we) get your obsession over a tangential observation. However, I don't intend to waste time getting derailed by your TDS inspired hobby horse but I will give you a chance to learn something.
COVID-19 is a new type of coronavirus that causes mild to severe cases. Here’s a quick guide on how to spot symptoms, risk factors, prevent spread of the disease, and find out what to do if you think you have it.
www.webmd.com
Warm temperatures and long hours of sunlight may reduce the spread of COVID-19, the study found.
www.livescience.com
This shouldn't be news to you. All Coronaviruses have a seasonal component and are more virulent in cold, dry air in winter. There is no reason to suppose that CV-19 is any different. And if you bother to look up the stuff I refer you to (and I doubt you will) then put worldometers on your list look at the CV-19 death chart (far more reliable than the case rate) for the US and it is face slapping clear: the explosion in cases (starting upon initial infections) exploded from February 2020 on. THEN deaths per day shrank dramatically for those Northern Eastern States during the summer, and this in the late fall exploded again to even greater rates than early 2020.
So yes, it is seasonal BUT there is a twist to CV19...its almost completely harmless outdoors and requires prolonged exposure inside structures. Moreover its mode of transmission is not primarily by visual droplets, but by invisible vapor particles that float. When a super-spreader (say in a bar or restaurant) pumps his/her covid into a room it recirculates and infects when the air reaches a particular density of virial particles.
So IN SPITE of the natural seasonality of COVID (meaning the summer UV, heat, and humidity work against it outdoors) the states (the south and south west) that require the most indoor air cooling at the peak of summer are the ones that were more infected in the summer of 2020...accounting for the smaller "wave" in that period.
So yes, it would not be surprising if this summer there was a bump in new cases in certain states due to increased indoor exposure ...which also happen to be the several states being compared (I assume) in the op.