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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.
RESUMO
Objective To explore the feasibility and advantage of the drones in a county emergency medical service system.Methods The study was conducted in Changxing County,Zhejiang Province from January to September 2018.The Changxing County People's Hospital and the health centers within its radius of 25 km were included in the study.Three types of indicators were obtained by using commercial drones to transfer simulated first-aid medical supplies from health centers to county people's hospitals:(1)The flight time of the drone;(2) The road traffic time measured by Baidu map and Tencent map software of the above-mentioned route at midnight;(3) The road traffic time measured by Amap software of these routes at 0:00,8:00,10:00,12:00,14:00,16:00,18:00,20:00.The road traffic time at different time points measured by map softwares and drones flight time were compared.Wilcoxon symbolic rank test was used for statistical analysis,and P value of ＜ 0.05 was considered statistically significant.Results (1) A total of 10 health centers were involved in this study,the air straight-line distance between them and the county people's hospital was (10.97±3.59) km,and the road traffic distance was (13.61±4.95) km.(2) The flight time of drone was (16.35±5.15) min,less than road traffic time measured by Amap,Baidu and Tencent map software,which were (21.40±5.15) min,(22.50±6.11) min,(22.00±5.23) min,respectively (P＜ 0.01).(3)The road traffic time measured by Amap software was longer than that of drones from 0:00 to 20:00 (P＜ 0.01),with the maximum time of (27.80±6.12) min at 18:00,and the minimum time of (21.40±5.15) min at midnight.Drones could save up 14.07 min at most and 2.8 min at least,with an average save of (7.98±1.32) min.Conclusions Drone might be used to transfer first aid medical supplies between health centers in a county area,which is faster than road transportation.It has a better application prospect and is worth to further study.
RESUMO
Objective@#To explore the feasibility and advantage of the drones in a county emergency medical service system.@*Methods@#The study was conducted in Changxing County, Zhejiang Province from January to September 2018. The Changxing County People's Hospital and the health centers within its radius of 25 km were included in the study. Three types of indicators were obtained by using commercial drones to transfer simulated first-aid medical supplies from health centers to county people's hospitals: (1)The flight time of the drone; (2) The road traffic time measured by Baidu map and Tencent map software of the above-mentioned route at midnight; (3) The road traffic time measured by Amap software of these routes at 0: 00, 8: 00, 10:00, 12:00, 14:00, 16:00, 18:00, 20:00. The road traffic time at different time points measured by map softwares and drones flight time were compared. Wilcoxon symbolic rank test was used for statistical analysis, and P value of < 0.05 was considered statistically significant.@*Results@#(1) A total of 10 health centers were involved in this study, the air straight-line distance between them and the county people's hospital was (10.97±3.59) km, and the road traffic distance was (13.61±4.95) km. (2) The flight time of drone was (16.35±5.15) min, less than road traffic time measured by Amap, Baidu and Tencent map software, which were (21.40±5.15) min, (22.50±6.11) min, (22.00±5.23) min, respectively (P< 0.01). (3)The road traffic time measured by Amap software was longer than that of drones from 0:00 to 20:00 (P< 0.01), with the maximum time of (27.80±6.12) min at 18:00, and the minimum time of (21.40±5.15) min at midnight. Drones could save up 14.07 min at most and 2.8 min at least, with an average save of (7.98±1.32) min.@*Conclusions@#Drone might be used to transfer first aid medical supplies between health centers in a county area, which is faster than road transportation. It has a better application prospect and is worth to further study.