Italian researchers told Reuters in March that they reported a higher than usual number of cases of severe pneumonia and flu in Lombardy in the last quarter of 2019 in a sign that the new coronavirus might have circulated earlier than previously thought.
意大利研究人员3月告诉路透社记者,他们报告说,2019年最后一个季度伦巴第发生的重症肺炎和流感病例比平时多,这表明这种新型冠状病毒可能在早于此前人们想象的时间就已流传开来。
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