Approximately 500,000 individuals from the United Kingdom were involved in a UVB-predicted vitamin D study, measuring the effect of vitamin D levels against severe covid-19 disease and death.
Ambient ultraviolet B (UVB) radiation is the precursor for vitamin D 
production within the skin. Most studies on vitamin D focus on vitamin D
 supplementation and its effect on covid-19 outcomes. This study 
investigated the role of daily sunshine exposure, because this is the 
purest, most important source of vitamin D. In the study, individuals 
with regular UVB exposure in their daily lives had a stronger immune 
response that protected them against severe respiratory disease and 
death....<<<Read More>>>...