目的 了解我国人感染H7N9的疫情的时空传播特性。方法 基于世界卫生组织关于H7N9的统计数据，借助时间序列分析、标准差椭圆分析等手段探究我国人感染H7N9的时空传播特性。结果 时间上，自2013年首次发现人感染H7N9事件至2018年最后一个感染病例被治愈，整个疫情以当年的10月至次年的9月形成五个阶段。病例数从第一阶段的134例上升到第二阶段的338例，然后降到第四阶段的144例，最后在第五阶段形成了爆发性的830例。每个阶段的高发期有所差距；其中1-2月为月份，爆发月份病例数占比高达51.74%。空间上，标准差椭圆的中心从靠近沿海的湖州市向内陆的抚州市、衢州市转移，最终到达黄冈市。椭圆覆盖区域也由较为集中的上海、浙江、江苏三省市扩展到涵盖山东、河南、四川、湖北、广东等近半个中国省份。并且通过长江三角洲、珠江三角洲和京津冀三个典型区域及周边地区的时空分析，得出我国不同地区疫情的差异：以长江三角洲为代表的高发于冬春季的严重区；以珠江三角洲为代表的具有阶段性爆发的较严重区；以京津冀为代表的病例少的平缓区。这些结果进一步验证了不同区域的时空传播特性。结论 我国人感染H7N9疫情的发展在时间上有明显的周期性和季节性，以每年12月至次年5月为高发期；空间上的疫情集中分布于东南沿海一带。
Objective To understand the spatiotemporal transmission characteristics of H7N9 infection in China. Methods Based on World Health Organization statistics on H7N9, the time-space transmission characteristics of human infection with H7N9 in China were investigated by means of time series analysis and standard deviation ellipse analysis. Results In time, from the first detection of human infection with H7N9 in 2013 to the last infection case in 2018, the entire epidemic formed five stages from October of that year to September of the following year. The number of cases increased from 134 in the first stage to 338 in the second stage, then decreased to 144 in the fourth stage, and finally an explosive 830 cases were formed in the fifth stage. There is a gap in the high incidence period at each stage; January to February is a month, and the number of cases in the outbreak month accounts for 51.74%. In space, the center of the standard deviation ellipse shifts from Huzhou near the coast to Fuzhou and Luzhou inland, and finally reaches Huanggang. The elliptical coverage area has also expanded from the more concentrated Shanghai, Zhejiang, and Jiangsu provinces to cover nearly half of China''s provinces including Shandong, Henan, Sichuan, Hubei, and Guangdong. And through the spatio-temporal analysis of the three typical regions of the Yangtze River Delta, the Pearl River Delta, and the Beijing-Tianjin-Hebei region and the surrounding areas, the differences in epidemic situation in different regions of our country are obtained: severe areas that occur frequently in winter and spring represented by the Yangtze River Delta; More severe areas with periodic outbreaks; gentle areas with fewer cases represented by Beijing, Tianjin and Hebei. These results further validate the spatiotemporal propagation characteristics of different regions. Conclusion The development of H7N9 epidemic in China has obvious periodicity and seasonality in time. The period of high incidence is from December to May each year. The epidemic in space is concentrated in the southeast coastal area.