Many of us here on FR understood this pretty early in the pandemic and we said it early and often.
While I also believe in the efficacy of IVM, HCQ, and zinc against Covid, this failure of public health to embrace vitamin D supplementation is in my opinion the most egregious error we made in an ocean of errors.
How many lives were lost because our health bureaucracy, with 60% plus funding by big pharma, was most concerned with protecting the EUA (and getting rid of Donald Trump)?
This single vitamin, which costs essentially nothing, is far safer and more efficacious than any vaccine.
In March 2020, I was doing shopping for our household and my two daughters. Costco happened to have D3 on sale. $6 or $7 for 600 pills of 2,000 IU. I got them each a bottle. They both eventually got COVID put recovered quickly. No jabs for anyone in their families.