en عمومی General پژوهشي Original Research <div style="text-align: justify;"><strong>Background</strong>: Coronavirus disease 2019 (COVID-19) is an invisible enemy that has made people observe issues such as eating habits, personal hygiene, and environmental factors that may affect their immune systems.<br> <strong>Objectives</strong>: Because air pollution can affect the immune system, it is necessary to examine the relationship between air quality parameters and COVID-19.&nbsp;<br> <strong>Methods</strong>: his study examines the correlation between air quality and COVID-19 considering 7 air pollutants: PM10, SO2, CO, NO2, NOx, NO, and O3. The confirmed COVID-19 cases were considered from 9 provinces, accounting for 78% of the total cases in Turkey. The required data were collected from the websites of the country&rsquo;s relevant official institutions. Two statistical tests, the Pearson correlation, and Spearman Rho were conducted to determine any potential linear and monotonic relationships.&nbsp;<br> <strong>Results</strong>: Based on both test results, a significant positive correlation was observed between air SO2 content and the number of COVID-19 cases in Turkey.<br> Conclusion: The outcomes could help identify provincial actions or measures.</div> COVID-19, Air pollutants, SARS-CoV-2, Air quality, Correlation 49 58 http://pbr.mazums.ac.ir/browse.php?a_code=A-10-855-1&slc_lang=en&sid=1 Mehmet Şahin mehmet.sahin@simon.rochester.edu 10031947532846005410 10031947532846005410 Yes Department of Industrial Engineering, Iskenderun Technical University, Iskenderun, Turkey.