目的 了解我國人感染H7N9的疫情的時空傳播特性。方法 基于世界衛生組織關于H7N9的統計數據，借助時間序列分析、標準差橢圓分析等手段探究我國人感染H7N9的時空傳播特性。結果 時間上，自2013年首次發現人感染H7N9事件至2018年最后一個感染病例被治愈，整個疫情以當年的10月至次年的9月形成五個階段。病例數從第一階段的134例上升到第二階段的338例，然后降到第四階段的144例，最后在第五階段形成了爆發性的830例。每個階段的高發期有所差距；其中1-2月為月份，爆發月份病例數占比高達51.74%?？臻g上，標準差橢圓的中心從靠近沿海的湖州市向內陸的撫州市、衢州市轉移，最終到達黃岡市。橢圓覆蓋區域也由較為集中的上海、浙江、江蘇三省市擴展到涵蓋山東、河南、四川、湖北、廣東等近半個中國省份。并且通過長江三角洲、珠江三角洲和京津冀三個典型區域及周邊地區的時空分析，得出我國不同地區疫情的差異：以長江三角洲為代表的高發于冬春季的嚴重區；以珠江三角洲為代表的具有階段性爆發的較嚴重區；以京津冀為代表的病例少的平緩區。這些結果進一步驗證了不同區域的時空傳播特性。結論 我國人感染H7N9疫情的發展在時間上有明顯的周期性和季節性，以每年12月至次年5月為高發期；空間上的疫情集中分布于東南沿海一帶。
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.