I am begining to settle on a hypothesis which proposes that Vitamin D levels in people prior to and during CV19 infection may be a significant variable determining severity of symptoms.

I’m not medically trained and this is still just conjecture but thought I’d put it out there

5G May also be a contributing factor but there is still no reliable evidence or analysis to suggest hot spots are areas where 5G is operating or being tested.

It’s interesting though that larger cities tend to be worst affected.
This could be related to both of the above.