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STUDY: Excess COVID-19 Cases and Deaths Linked To Wildfire Smoke

According to the most recent scientific study, the pollutants contained in the smoke from wildfires may be the actual cause of the increased COVID cases and deaths caused by COVID 19.

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The study was published in the journal Science Advances. It links “fine particle pollution known as PM2.5, which measures 2.5 micrometers across and is produced by wildfires, among other sources, to a significant increase in COVID-19 cases and deaths in California, Oregon, and Washington state.”

“The wildfires exacerbated the pandemic substantially,” said Francesca Dominici, a Harvard biostatistician and author of the study, in remarks to National Geographic.

The study sought to gauge the impact of last year’s wildfires in the three states on excess COVID-19 cases and deaths by evaluating their correlation with data on short-term PM2.5 exposure, while seeking to account for a number of confounding factors, including weather, seasonality, long-term trends, mobility, and population size.

Evaluating data from 92 counties affected by fires, the study’s authors “found strong evidence that wildfires amplified the effect of short-term exposure to PM2.5 on COVID-19 cases and deaths, although with substantial heterogeneity across counties.”

Heterogeneity refers to clinical, statistical, or methodological variability among studies in a systematic review.

For COVID-19 cases, the study found that 52 of 92 counties had “strong evidence” of a positive association between PM2.5 and heightened risk of contracting the respiratory illness, which is caused by the CCP (Chinese Communist Party) virus, also known as the SARS-CoV-2 or the novel coronavirus.


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While there were sharp differences across counties, when pooled across multiple counties, the results indicated that a daily increase of 10 micrograms per cubic meter in PM2.5 for 28 subsequent days was associated with an 11.7 percent increase in COVID-19 cases. In two counties with the highest impact—Sonoma, California, and Whitman, Washington—the researchers concluded that the same level of PM2.5 over the same time horizon was associated with a 65.3 percent and 71.6 percent increase in infections, respectively.

There was also significant variability among counties in terms of COVID-19 deaths, with 17 of 92 counties reflecting “strong evidence of a positive association” between PM2.5 and fatalities. Under the same PM2.5 exposure parameters as above, the researchers found an 8.4 percent overall increase in deaths, with two California counties—Calaveras and San Bernardino—coming in at 52.8 percent and 65.9 percent, respectively.

Overall, the study concluded that the PM2.5 in wildfire smoke likely accounted for 19,742 more COVID-19 cases and 748 more deaths than would have been the case absent the fine pollutant.

“We found strong evidence of a positive association between daily increases in PM2.5 and increased risks of COVID-19 cases and deaths, cumulatively up to 4 weeks,” the researchers wrote.

While scientists continue to learn more about how wildfires impact human health, an expert told National Geographic that PM2.5 could make it easier for the CCP virus to enter the body by compromising certain cells that help expel various pathogens.”

Source
theepochtimes.comnationalgeographic.comadvances.sciencemag.org

Ava Garcia

A small town girl, dreaming big, expecting to change the world with presenting the truthful events of the world today. Law degree with a master in criminology, and a devoted journalist for over 7 years, and counting. "The pen is mightier than the sword."

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