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The outbreak of coronavirus disease (COVID-19) was first reported from Wuhan,
China, on December 31st, 2019. As the number of coronavirus infections has
exceeded 100,000 with toll deaths of about 5000 worldwide as of early March,
2020, scientists and researchers are racing to investigate the nature of this virus
and evaluate the short and long term effects of this disease. Despite its negative
impacts that obliged the World Health Organization to declare COVID-19 epidemic
as a Public Health Emergency of International Concern, the rate of mortality of
this infection has not exceeded 3.4% globally. On the other hand, the mortality
rate caused by ambient air pollution has contributed to 7.6% of all deaths in 2016
worldwide. The outbreak of COVID-19 has forced China to lockdown its industrial
activities and hence dropped its NO2 and carbon emissions by 30 and 25%,
respectively. This work reports on the first case study that compares the air
quality status before and after the crisis. It sheds light on the facts related to the
demographics of deaths by gender, age and health status before infection. The
historical data on air quality, estimates of annual deaths and its economic burden
have been presented and analyzed. The actual daily deaths due to COVID-19 have
been obtained from the official records of the daily Situation Reports published by
World Health Organization as of March 11th. The rate of mortality due to
COVID-19 was impacted by two factors: age and health status. Results show that
75% of deaths were related to cases that had underlying present diseases with the
majority aged of 80+ years. The reported figures were compared with the average
daily mortality due to poor air quality which reached up to 3287 deaths due to
high levels of NO2, O3 and PM. The air quality status before the crisis was
compared with the current situation showing that COVID-19 forced-industrial and
anthropogenic activities lockdown may have saved more lives by preventing
ambient air pollution than by preventing infection.

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Á¦ 1Æí Äڷγª¹ÙÀÌ·¯½º Á¤ÀÇ
1. Äڷγª¹ÙÀÌ·¯½º°¨¿°Áõ-19(Covid-19) Á¤º¸ 7
2. Äڷγª¹ÙÀÌ·¯½º ºÐ·ù ¹× Ư¼º 9
3. Äڷγª¹ÙÀÌ·¯½º ÀüÀÚÇö¹Ì°æ ÇüÅ 11
4. Äڷγª¹ÙÀÌ·¯½º ±¸Á¶ (Covid-19 Organization) 13
5. Äڷγª19: ȯ°æ¿¡ Áö¼ÓÀûÀÎ ¿µÇâÀ» ¹ÌÄ¥±î? 19
6. Ä¡·á¹ý(Therapeutical Method) 22

Á¦ 2Æí ¿¬±¸³í¹®
The dramatic impact of Coronavirus outbreak on air quality:
Has it saved as much as it has killed so far?

1. Introduction 24
2. MATERIALS AND METHODS 32
3. CONCLUSION 34
4. AUTHOR CONTRIBUTIONS 34
5. ACKNOWLEDGMENT 34
6. CONFLICT OF INTEREST 34
7. References 35