|
|
|
| Characteristics of individuals positive for SARS-CoV-2 nucleic acid in a centralized isolation site for people entering China |
| SHI Changmiao1, AO Xinhua2, SHAO Bin1, YANG Weifeng3, WANG Weihong4, TONG Zhaowei4, SHEN Jianyong5, YU Yuhui2
|
1. Administrative Office of Changxing Center for Disease Control and Prevention, Changxing, Zhejiang 313100, China;
2. Changxing Health Bureau, Changxing, Zhejiang 313100, China;
3. Changxing Maternal and Child Health Hospital, Changxing, Zhejiang 313100, China;
4. Huzhou Central Hospital, Huzhou, Zhejiang 313003, China;
5. Huzhou Center for Disease Control and Prevention, Huzhou, Zhejiang 313000, China |
|
|
|
|
Abstract Objective To analyze the characteristics of individuals positive for SARS-CoV-2 nucleic acid in a centralized isolation site for people entering China in Huzhou City of Zhejiang Province from December 18, 2021 to January 12, 2022, so as to provide insights into the prevention and control of overseas imported COVID-19. Methods The basic characteristics, nucleic acid detection and epidemiological investigations were collected from individuals positive for SARS-CoV-2 nucleic acid in a centralized isolation site for people entering China from December 18, 2021 to January 12, 2022, and the temporal distribution, population distribution, source of importation, and virus typing were descriptively analyzed. Results From December 18, 2021 to January 12, 2022, a total of 2 974 individuals in 19 flights were recorded in this centralized isolation site, and 33 cases were tested positive for SARS-CoV-2 nucleic acid, including 21 confirmed cases with common type, 9 confirmed cases with mild type, and 3 cases with asymptomatic infections. There were 11 cases with Omicron infections ( 33.33% ), 5 cases with Delta infections ( 15.15% ), and 17 cases with infection of unidentified types ( 51.52% ). The median interval ( interquartile range ) from the time of entry to the time of a positive test was 4.0 ( 7.0 ) days among all positive cases, 0 ( 4.0 ) day among cases with Omicron infections and 4.5 ( 8.5 ) days among cases with infections of Delta and unidentified types. The positive cases had a mean age of ( 36.97±8.58 ) years, and included 27 men (81.82%). There were 30 cases ( 90.91% ) receiving two and more doses of COVID-19 vaccines, and 7 cases ( 21.21% ) with a previous history of SARS-CoV-2 infections. There were 19 cases ( 57.58% ) from African countries, and 7 of 11 cases with Omicron infections were imported from African countries. Conclusion Omicron infection was predominant among individuals positive for SARS-CoV-2 nucleic acid in this centralized isolation site for people entering China from December 18, 2021 to January 12, 2022, with no severe cases detected, and most positive cases were imported from African countries.
|
|
Received: 17 January 2022
Revised: 17 February 2022
Published: 13 April 2022
|
|
|
|
|
|
[1] World Health Organization.WHO coronavirus disease(COVID-19)dashboard[EB/OL].(2022-01-12)[2022-02-17].https://covid19.who.int.
[2] 胡敏,岳勇,杜训波,等.四川省成都市境外输入新型冠状病毒肺炎病例流行病学特征分析[J].疾病监测,2021,36(6):587-592.
HU M,YUE Y,DU X B,et al.Epidemiological characteristics of imported cases of coronavirus disease 2019 in Chengdu,Sichuan[J].Dis Surveill,2021,36(6):587-592.
[3] 倪晓媚,柯珍,季小微,等. 青田县一起境外输入新型冠状病毒肺炎聚集性疫情分析[J]. 预防医学,2020,32(7):678-681.
NI X M,KE Z,JI X W,et al.Investigation on a cluster of overseas imported COVID-19 in Qingtian County[J]. Prev Med,2020,32(7):678-681.
[4] 中华人民共和国国家卫生健康委员会.截至1月12日24时新型冠状病毒肺炎疫情最新情况[EB/OL].(2022-01-13)[2022-02-17].http://www.nhc.gov.cn/xcs/yqtb/202201/2586bb51113b45bbb7c00e86beeec0eb.shtml.
[5] 国务院应对新型冠状病毒肺炎疫情联防联控机制综合组.关于印发新型冠状病毒肺炎防控方案(第八版)的通知[EB/OL].(2021-05-11)[2022-02-17].http://www.gov.cn/xinwen/2021-05/14/content_5606469.htm.
[6] 中华人民共和国国家卫生健康委员会办公厅国家中医药管理局办公室.关于印发新型冠状病毒肺炎诊疗方案(试行第八版修订版)的通知[EB/OL].(2021-04-14)[2022-02-17].http://www.gov.cn/zhengce/zhengceku/2021-04/15/content_5599795.htm.
[7] 黄国华,简敏婷,麦炜.肇庆市新冠肺炎境外输入病例流行病学特征分析[J].中国公共卫生管理,2021,37(5):675-677.
HUANG G H,JIAN M T,MAI W.Epidemiological characteristics of imported COVID-19 cases in Zhaoqing City[J].Chin J Public Health Manag,2021,37(5):675-677.
[8] 詹钦勇. 厦门市一起入境航班中发现30例旅客新冠感染者疫情的启示[J].海峡预防医学杂志,2021,27(4):18-20.
ZHAN Q Y.Enlightenment from the discovery of 30 cases of coronavirus infection in passengers on an inbound flight in Xiamen City[J].Strait J Prev Med,2021,27(4):18-20.
[9] 戚小华,刘碧瑶,王臻,等.浙江省境外输入新型冠状病毒肺炎病例特征[J].预防医学,2021,33(6):541-550.
QI X H,LIU B Y,WANG Z,et al.The characteristics of imported COVID-19 cases from abroad to Zhejiang Province[J].Prev Med,2021,33(6):541-550.
[10] 吴俣,刘珏,刘民,等.新型冠状病毒Omicron变异株的流行病学特征及防控研究[J].中国全科医学,2022,25(1):14-19.
WU Y,LIU J,LIU M,et al.Epidemiologic features and containment of SARS-CoV-2 Omicron variant[J].Chin Gen Pract,2022,25(1):14-19.
[11] 林恺,林醒忠,肖武,等.福州关区入境新冠病毒核酸阳性案例流行病学特征分析[J].中国国境卫生检疫杂志,2021,44(3):165-167.
LIN K,LIN X Z,XIAO W,et al.Epidemiological characteristics of imported SARS-CoV-2 nucleic acid positive at ports of Fuzhou Customs District[J].Chin J Front Health Quarantine,2021,44(3):165-167.
[12] 王惟信,陈磊,汪习,等.国境口岸抗击新冠肺炎疫情的阶段性思考[J].中国国境卫生检疫杂志,2021,44(6):440-443.
WANG W X,CHEN L,WANG X,et al.Periodical thinking of COVID-19 pandemic prevention at frontier ports[J].Chin J Front Health Quarantine,2021,44(6):440-443.
[13] 沈淑容,马紫程,许以灵,等.新型冠状病毒境外输入对我国疫情的影响[J].浙江师范大学学报(自然科学版).2021,44(2):197-205.
SHEN S R,MA Z C,XU Y L,et al.Epidemic impact of overseas-imported COVID-19 infected cases on China[J].J Zhejiang Norm Univ(Nat Sci),2021,44(2):197-205. |
|
|
|
