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A 14+7 day quarantine period and a dual nucleic acid testing reagent strategy detect potentially indiscoverable Coronavirus disease 2019 infections in Xiamen, China. Clin Chim Acta 2022; 532:89-94. [PMID: 35679913 PMCID: PMC9169423 DOI: 10.1016/j.cca.2022.06.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 06/03/2022] [Indexed: 11/28/2022]
Abstract
Background Determining what quarantine period and detection strategy are more effective and sustainable remains a challenge for further prevention and social stability. Methods From October 2020 to December 2021, 290,547 inbound overseas travelers were subject to government quarantine in Xiamen, China. The detection rate of COVID-19 during different quarantine periods using dual or single nucleic acid testing reagents. Results The COVID-19 positive rate was 1.79% (519/290,547). The detection rates during the 7-day, 14-day and 14+7-day quarantine periods using the dual reagents were 78.4%, 91.7%, and 100%, respectively. The detection rate of the 7-day, 14-day and 14+7-day quarantine periods were 73.99%, 86.51%, and 94.22%, respectively, using the Liferiver reagent and 72.25%, 84.59%, and 91.91%, respectively, using the Daan reagent. Based on the 14+7 day strategy, dual nucleic acid testing reagent strategy detected all imported cases, but 30 cases (5.78%) were not detected via Liferiver reagent and 42 (8.09%) cases not detected via Daan reagent. Conclusion A 14+7-day quarantine period and dual nucleic acid testing reagent strategy are effective screening methods for COVID-19 among inbound overseas travelers. The superior detection rate of these strategies reduce the risk of secondary transmission of the SARS-CoV-2 virus.
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Talic S, Shah S, Wild H, Gasevic D, Maharaj A, Ademi Z, Li X, Xu W, Mesa-Eguiagaray I, Rostron J, Theodoratou E, Zhang X, Motee A, Liew D, Ilic D. Effectiveness of public health measures in reducing the incidence of covid-19, SARS-CoV-2 transmission, and covid-19 mortality: systematic review and meta-analysis. BMJ 2021; 375:e068302. [PMID: 34789505 PMCID: PMC9423125 DOI: 10.1136/bmj-2021-068302] [Citation(s) in RCA: 288] [Impact Index Per Article: 96.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/21/2021] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To review the evidence on the effectiveness of public health measures in reducing the incidence of covid-19, SARS-CoV-2 transmission, and covid-19 mortality. DESIGN Systematic review and meta-analysis. DATA SOURCES Medline, Embase, CINAHL, Biosis, Joanna Briggs, Global Health, and World Health Organization COVID-19 database (preprints). ELIGIBILITY CRITERIA FOR STUDY SELECTION Observational and interventional studies that assessed the effectiveness of public health measures in reducing the incidence of covid-19, SARS-CoV-2 transmission, and covid-19 mortality. MAIN OUTCOME MEASURES The main outcome measure was incidence of covid-19. Secondary outcomes included SARS-CoV-2 transmission and covid-19 mortality. DATA SYNTHESIS DerSimonian Laird random effects meta-analysis was performed to investigate the effect of mask wearing, handwashing, and physical distancing measures on incidence of covid-19. Pooled effect estimates with corresponding 95% confidence intervals were computed, and heterogeneity among studies was assessed using Cochran's Q test and the I2 metrics, with two tailed P values. RESULTS 72 studies met the inclusion criteria, of which 35 evaluated individual public health measures and 37 assessed multiple public health measures as a "package of interventions." Eight of 35 studies were included in the meta-analysis, which indicated a reduction in incidence of covid-19 associated with handwashing (relative risk 0.47, 95% confidence interval 0.19 to 1.12, I2=12%), mask wearing (0.47, 0.29 to 0.75, I2=84%), and physical distancing (0.75, 0.59 to 0.95, I2=87%). Owing to heterogeneity of the studies, meta-analysis was not possible for the outcomes of quarantine and isolation, universal lockdowns, and closures of borders, schools, and workplaces. The effects of these interventions were synthesised descriptively. CONCLUSIONS This systematic review and meta-analysis suggests that several personal protective and social measures, including handwashing, mask wearing, and physical distancing are associated with reductions in the incidence covid-19. Public health efforts to implement public health measures should consider community health and sociocultural needs, and future research is needed to better understand the effectiveness of public health measures in the context of covid-19 vaccination. SYSTEMATIC REVIEW REGISTRATION PROSPERO CRD42020178692.
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Affiliation(s)
- Stella Talic
- School of Public Health and Preventive Medicine, Monash University, Melbourne, 3004 VIC, Australia
- Monash Outcomes Research and health Economics (MORE) Unit, Monash University, VIC, Australia
| | - Shivangi Shah
- School of Public Health and Preventive Medicine, Monash University, Melbourne, 3004 VIC, Australia
| | - Holly Wild
- School of Public Health and Preventive Medicine, Monash University, Melbourne, 3004 VIC, Australia
- Torrens University, VIC, Australia
| | - Danijela Gasevic
- School of Public Health and Preventive Medicine, Monash University, Melbourne, 3004 VIC, Australia
- Centre for Global Health, The Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Ashika Maharaj
- School of Public Health and Preventive Medicine, Monash University, Melbourne, 3004 VIC, Australia
| | - Zanfina Ademi
- School of Public Health and Preventive Medicine, Monash University, Melbourne, 3004 VIC, Australia
- Monash Outcomes Research and health Economics (MORE) Unit, Monash University, VIC, Australia
| | - Xue Li
- Centre for Global Health, The Usher Institute, University of Edinburgh, Edinburgh, UK
- School of Public Health and The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Wei Xu
- Centre for Global Health, The Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Ines Mesa-Eguiagaray
- Centre for Global Health, The Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Jasmin Rostron
- Centre for Global Health, The Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Evropi Theodoratou
- Centre for Global Health, The Usher Institute, University of Edinburgh, Edinburgh, UK
- Cancer Research UK Edinburgh Centre, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Xiaomeng Zhang
- Centre for Global Health, The Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Ashmika Motee
- Centre for Global Health, The Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Danny Liew
- School of Public Health and Preventive Medicine, Monash University, Melbourne, 3004 VIC, Australia
- Monash Outcomes Research and health Economics (MORE) Unit, Monash University, VIC, Australia
| | - Dragan Ilic
- School of Public Health and Preventive Medicine, Monash University, Melbourne, 3004 VIC, Australia
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