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Abstract：
China\'s vigorous anti-COVID-19 campaign has been going on for three months since January 20, which has contained the spread of the virus across China.
Epidemiological investigations found that COVID-19 fatality rates in Wuhan, rest parts of Hubei province except Wuhan (Rest of Hubei) and rest parts of Mainland China except Hubei province (Rest of China) were different. An ecological study was conducted to analyze the reasons and provide the world with China\'s anti-COVID-19 epidemic experiences.
Infected cases from Mainland China were divided into three populations: Wuhan, Rest of Hubei and Rest of China. Methods were based on The Novel Coronavirus Infected Pneumonia Diagnosis and Treatment Standards. Total confirmed cases, daily severe cases, total deaths from February 12 to April 20 were collected for statistical analysis.
50,333 total confirmed cases in Wuhan made up the most substantial part by comparison with 17,795 in Rest of Hubei and 14,630 in Rest of China, respectively. In the early stage of the COVID-19 epidemic, daily severe cases in Wuhan accounted for the majority, and as the epidemic controlled, severe cases in all three populations decreased. Total deaths in Wuhan constituted the most significant proportion, with the highest 3869 in contrast to 643 in Rest of Hubei and 120 in Rest of China. The fatality rates in Wuhan ranged from 2.82% to 7.69%, much higher than 1.80-3.61% in Rest of Hubei, and 0.49-0.88% in Rest of China. Pearson chi-square test for fatality rates in the three populations demonstrated significant differences (p < 0.01).
The ecological comparison study among the three populations have proved that social distancing, quarantine, lockdown, cutting off sources of infection and transmission routes, early detection, early isolation, early treatment are all vital to control the epidemic by reducing COVID-19 confirmed cases, severe cases and the fatality rate.
Epidemiological investigations found that COVID-19 fatality rates in Wuhan, rest parts of Hubei province except Wuhan (Rest of Hubei) and rest parts of Mainland China except Hubei province (Rest of China) were different. An ecological study was conducted to analyze the reasons and provide the world with China\'s anti-COVID-19 epidemic experiences.
Infected cases from Mainland China were divided into three populations: Wuhan, Rest of Hubei and Rest of China. Methods were based on The Novel Coronavirus Infected Pneumonia Diagnosis and Treatment Standards. Total confirmed cases, daily severe cases, total deaths from February 12 to April 20 were collected for statistical analysis.
50,333 total confirmed cases in Wuhan made up the most substantial part by comparison with 17,795 in Rest of Hubei and 14,630 in Rest of China, respectively. In the early stage of the COVID-19 epidemic, daily severe cases in Wuhan accounted for the majority, and as the epidemic controlled, severe cases in all three populations decreased. Total deaths in Wuhan constituted the most significant proportion, with the highest 3869 in contrast to 643 in Rest of Hubei and 120 in Rest of China. The fatality rates in Wuhan ranged from 2.82% to 7.69%, much higher than 1.80-3.61% in Rest of Hubei, and 0.49-0.88% in Rest of China. Pearson chi-square test for fatality rates in the three populations demonstrated significant differences (p < 0.01).
The ecological comparison study among the three populations have proved that social distancing, quarantine, lockdown, cutting off sources of infection and transmission routes, early detection, early isolation, early treatment are all vital to control the epidemic by reducing COVID-19 confirmed cases, severe cases and the fatality rate.
摘要：
自1月20日以来，中国强有力的反COVID-19运动已经持续了三个月，遏制了该病毒在中国的传播。
流行病学调查发现，武汉的COVID-19死亡率，湖北省除武汉以外的其他地区（湖北其他地区）和中国大陆除湖北省以外的其他地区（中国其他地区）有所不同。进行了生态学研究，分析了其原因，并为世界提供了中国的抗COVID-19流行经验。
来自中国大陆的感染病例分为三个人群：武汉，湖北其他地区和中国其他地区。方法依据新型冠状病毒感染肺炎诊断和治疗标准。确诊病例总数,每日严重病例，收集2月12日至4月20日的总死亡病例进行统计分析.
武汉的确诊病例总数为50,333例，而湖北其他地区为17,795例，中国其他地区为14,630例，分别。在COVID-19流行的早期阶段，武汉每日重症病例占大多数，随着疫情的控制，所有三个人群的严重病例均减少。武汉总死亡人数占比最大,最高的3869，湖北其他地区为643，中国其他地区为120。武汉市病死率为2.82%至7.69%,远高于湖北其他地区的1.80-3.61%，中国其他地区为0.49-0.88%。三个人群死亡率的Pearson卡方检验显示出显着差异（p<0.01）。
三个种群之间的生态比较研究证明了社会距离，检疫,封锁,切断感染源和传播途径，早期发现,早期隔离,早期治疗对减少COVID-19确诊病例控制疫情至关重要，严重病例和死亡率。
流行病学调查发现，武汉的COVID-19死亡率，湖北省除武汉以外的其他地区（湖北其他地区）和中国大陆除湖北省以外的其他地区（中国其他地区）有所不同。进行了生态学研究，分析了其原因，并为世界提供了中国的抗COVID-19流行经验。
来自中国大陆的感染病例分为三个人群：武汉，湖北其他地区和中国其他地区。方法依据新型冠状病毒感染肺炎诊断和治疗标准。确诊病例总数,每日严重病例，收集2月12日至4月20日的总死亡病例进行统计分析.
武汉的确诊病例总数为50,333例，而湖北其他地区为17,795例，中国其他地区为14,630例，分别。在COVID-19流行的早期阶段，武汉每日重症病例占大多数，随着疫情的控制，所有三个人群的严重病例均减少。武汉总死亡人数占比最大,最高的3869，湖北其他地区为643，中国其他地区为120。武汉市病死率为2.82%至7.69%,远高于湖北其他地区的1.80-3.61%，中国其他地区为0.49-0.88%。三个人群死亡率的Pearson卡方检验显示出显着差异（p<0.01）。
三个种群之间的生态比较研究证明了社会距离，检疫,封锁,切断感染源和传播途径，早期发现,早期隔离,早期治疗对减少COVID-19确诊病例控制疫情至关重要，严重病例和死亡率。
