Increased sunlight exposure linked to reduced coronavirus death risk

The study, published in The British Journal of Dermatology, found that the Mortality Risk Ratio – or the ratio between the likelihood of dying for a certain population group and the risk of death for all other population groups – in the US fell by 29% for every 100 KJ/meter squared increase in mean daily UVA. In Italy and England there was an estimated pooled decline of 32%. Researchers are examining what could be behind this correlation with one possible explanation being nitric oxide that is released by the skin when it is exposed to sunlight. Some studies suggest that the skin's release of nitric oxide may reduce the ability of the SARS Coronavirus2 to replicate. Another possible explanation is the fact that other studies have shown that increased exposure to sunlight is associated with fewer heart attacks and lower blood pressure, both factors that could possibly reduce the risk of dying from COVID-19.
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