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Deprecated: Implicit conversion from float 249.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Int+J+Environ+Res+Public+Health 2020 ; 17 (11): ä Nephropedia Template TP
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Air Quality Variation in Wuhan, Daegu, and Tokyo during the Explosive Outbreak of COVID-19 and Its Health Effects #MMPMID32526996
Ma CJ; Kang GU
Int J Environ Res Public Health 2020[Jun]; 17 (11): ä PMID32526996show ga
This study was designed to assess the variation of the air quality actually measured from the air pollution monitoring stations (AQMS) in three cities (Wuhan, Daegu, and Tokyo), in Asian countries experiencing the explosive outbreak of COVID-19, in a short period of time. In addition, we made a new attempt to calculate the reduced Dose(PM)(2.5) (mug) at the bronchiolar (Br.) and alveolar-interstitial (AI) regions of the 10-year-old children after the city lockdown/self-reflection of each city. A comparison of the average PM(2.5) of a month before and after the lockdown (Wuhan) and self-reflection (Daegu and Tokyo) clearly shows that the PM(2.5) concentration was decreased by 29.9, 20.9, and 3.6% in Wuhan, Daegu and Tokyo, respectively. Wuhan, Daegu and Tokyo also recorded 53.2, 19.0, and 10.4% falls of NO(2) concentration, respectively. Wuhan, which had the largest decrease of PM(2.5) concentration due to COVID-19, also marked the largest reduced Dose(PM)(2.5)(10-year-old children) (mug) (3660 mug at Br. and 6222 mug at AI), followed by Daegu (445 mug at Br. and 1,287 mug at AI), and Tokyo (18 mug at Br. and 52 mug at AI), over two months after the city lockdown/self-reflection. Our results suggest that the city lockdown/self-reflection had the effect of lowering the concentration of PM(2.5), resulting in an extension of the period it took to the acute allergic airway inflammation (AAI) for the 10-year-old children.