People living in areas with the highest level of UV exposure Type A have a lower risk of dying with covid – 19
Recent survey found that exposure to sunlight -specifically ultraviolet type a (UVA)- is associated with lower mortality rates ncov “SGRF-19”.
The study was conducted by researchers from the University of Edinburgh and accepted for publication in the British Journal of Dermatology.
The researchers compared recorded covid-19 deaths in the United States from January to April 2020 with UV levels in 2,474 U.S. counties for the same time period.
The study found that people living in areas with higher UV-A exposure had a lower risk of dying with covid-19, compared to those living in environments with lower levels. The analysis was repeated in England and Italy with the same results.
Experts said the marked reduction in the risk of dying from covid-19 could not be explained by higher levels of vitamin D, which is produced in the skin when exposed to sunlight.
One explanation for the low number of deaths is that exposure to sunlight causes the skin to release nitric oxide, and this may reduce the ability of coronavirus-whose scientific name is SARS Cove 2 – to reproduce.
UV A stimulates the release of cutaneous photolabile nitric oxide-no, which affects the cardiovascular system and metabolic syndrome, both risk factors for covid-19, the study said.
The previous research showed that increased sun exposure is linked to improving cardiovascular health, with lower blood pressure and reduce heart attacks. Because heart disease is a known risk factor for death from covid-19, this may also explain the results of the study.
The researchers found that in the United States, The Mortality Risk Ratio decreases by 29% per 100 KJ/m2 increase in the average daily UV light.
This was replicated in independent studies in Italy and England, and the researchers estimated a combined reduction in the risk of death by 32% per 100 KJ/m2 across the three studies.
Exposure to more prolonged UV rays “eh” may have health benefits for the population, the researchers said.
The researchers-according to a report in the eurek alert website – said that because of the observational nature of the study, a cause-and-effect relationship could not be determined. However, the data may lead to interventions that can be tested as potential treatments.
Dr. Richard Wheeler, consultant dermatologist at the University of Edinburgh and one of the authors of the study, “there is still a lot we don’t understand about these-19, which has led to many deaths all over the world. These early results indicate exposure to sunlight as a way to reduce the possibility of death.”
Sunlight and UV rays
The sun’s Rays include 3 types of ultraviolet (UV) rays, each of which has certain qualities, namely:
UV type a (UVA): the lowest energy type of UV, plays a role in indirect DNA damage, skin aging and wrinkles, and also plays a role in some types of skin cancer.
UV Type “B” (UVB): it is mainly responsible for direct damage to DNA, and skin burns caused by sun exposure, most cases of skin cancer.
UV Type C (UVC): it is the strongest type of UV, which is why it usually reacts with ozone in the upper layer of the atmosphere and is absorbed there, thus not reaching the ground.