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465

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>The researchers note that vitamin D has already been shown to help those with Covid-19. The vitamin is readily available over the counter, and around 20% of the population is deficient.

Sounds big pharma. Instead of telling people to sun bath in the few remaining days until mid September: just 'Buy the pills'

>The study was conducted to determine the prevalence of vitamin D deficiency among the adult population of Isfahan, a centrally-located city in Iran.

Not very representative of the US or North American population, is it?