>People in regions with the highest level of exposure to UVA rays (which make up 95% of the sun's UV light) were less likely to die of COVID-19 than those in regions with the lowest levels of UVA exposure, the findings showed. They could have looked online or in various books to find hundreds of years of information on this already proven fact. >The association between greater sun exposure and a lower risk of death from COVID-19 couldn't be explained by higher levels of vitamin D because only regions with levels of UVB that were too low to produce significant vitamin D in the body were included in the study, the authors said. So use UVB which has the lowest Vitamin D levels to prove that vitamin D isn't the cause for people recovering from Covid. When UVA would prove the opposite. I'm guessing common sense never plays into these studies.