肇庆市新冠肺炎境外输入病例流行病学特征分析

Epidemiological characteristics of imported COVID-19 cases in Zhaoqing City

目的了解新冠肺炎境外输入病例的流行特征,为完善境外输入疫情的防控策略提供科学依据。方法采用SPSS19.0软件对截至2021年5月1日全国传染病报告信息管理系统中广东省肇庆市新冠肺炎境外输入病例数据和肇庆市各级疾控中心流行病学调查报告进行整理和统计分析。结果截至2021年5月1日,肇庆市累计报告新冠肺炎境外输入病例39例。感染者职业以工人为主,48.71%的感染者在入境后1~<4d发现感染新冠病毒。39例感染者首次核酸检测阳性样本中,有13例双靶位基因Ct值>33,确诊病例和无症状感染者平均治疗时间分别为30.25d和26.31d,入院后共有20例病例复阳。结论肇庆市新冠肺炎境外输入病例存在一定的复阳比例,其传播风险较低。根据病例特征实施分类管理有利于精准防控,合理有效地利用医疗资源。

Objective To know the epidemiological characteristics of imported COVID-19 cases and provide scientific basis of prevention and control strategy of the imported epidemic.Methods The data of imported COVID-19 cases in Zhaoqing City reported till May 1,2021 were obtained from National Notifiable Disease Report System of China CDC,and field epidemiological investigation reports by CDCs in Zhaoqing was summarized and statistically analyzed.Results Till May 2021,a total of 39 imported COVID-19 cases have been reported in Zhaoqing City.The main occupational distributions of the cases were workers.48.71%imported cases were identified within 1~<4 d after entry.Among them,13 have RT-PCR Ct>33.The average treatment time of confirmed cases and asymptomatic infection cases was 30.25 days and 26.31 days,respectively.A total of 20 recurrence cases were identified.Conclusion There is a proportion of cases who tested positive for SARS-CoV-2 after recovery,however,its transmission risk of COVID-19 in communities is low.Classified management based on the characteristics of cases is more conducive to precise prevention and control,and reasonable and effective use of medical resources.