哈尔滨市于1955年开始记载流的流行状况,其流行多以散在发生及局部小暴发的形式出现。于1957——1958年出现两个双峰波的全市性大流行,这次流行和全国流行时间一致。相隔13年后,于1970——1971年又出现一次全市性的大流行(以上见图一)。这次流行和我国北方诸省、市的流行时间相一致。此外,如图一所示,于1965年10月初到12月期间在全市范围内还发生一次高于一般年份的流流行。 Harbin City began to record the prevalence of the flow in 1955, and its prevalence was mostly in the form of scattered occurrences and partial minor outbreaks. The citywide pandemic with two bimodal waves appeared between 1957 and 1958, and this epidemic was in line with the prevalence throughout the country. Thirteen years later, another pan-city pandemic took place in 1970-1971 (see figure I above). This epidemic is consistent with the popular time of the provinces and cities in northern China. In addition, as shown in Figure 1, there was also a prevalence of higher-than-usual years in the city from the beginning of October to the end of December 1965.