Association of public health interventions and COVID-19 incidence in Vietnam, January to December 2020

International Journal of Infectious Diseases

Thai Quang Pham¹  Hung Thai Do²  Chien Chinh Vien³  Khanh Cong Nguyen⁴  Mai Thi Quynh Le⁴  Nghia Duy Ngu⁵  Ha-Linh Quach⁶  Florian Vogt⁶  Lan Trong Phan⁶  Ngoc-Anh Hoang⁶  Duong Nhu Tran⁶  Duc-Anh Dang⁷  Tu Anh Tran⁸  Dinh Cong Phung⁸  Quang Dai Tran⁹  Tan Quang Dang^1,10 

[1] Corresponding authors: Cong-Khanh Nguyen, Department of Communicable Diseases Control, National Institute of Hygiene and Epidemiology, 1 Yersin Street, Hai Ba Trung District, Hanoi 100000, Vietnam. Tel: [phone].;Corresponding authors: Ngoc-Anh Hoang, Department of Epidemiology, National Institute of Hygiene and Epidemiology, Hanoi, Vietnam;National Centre for Epidemiology and Population Health, Research School of Population Health, College of Health and Medicine, Australian National University, Canberra, ACT, Australia. Tel: [phone].;National Centre for Epidemiology and Population Health, Research School of Population Health, College of Health and Medicine, Australian National University, Canberra, ACT, Australia;School of Preventive Medicine and Public Health, Hanoi Medical University, Hanoi, Vietnam;Department of Epidemiology, National Institute of Hygiene and Epidemiology, Hanoi, Vietnam;Ho Chi Minh Pasteur Institute, Ho Chi Minh City, Vietnam;National Institute of Hygiene and Epidemiology, Hanoi, Vietnam;Nha Trang Pasteur Institute, Nha Trang City, Khanh Hoa, Vietnam;Tay Nguyen Institute of Hygiene and Epidemiology, Dak Lak, Vietnam;

关键词: Vietnam;    Public health intervention;    COVID-19;    Quarantine;    Contact tracing;    Containment delay;   

DOI  :  

来源: DOAJ

【 摘 要 】

Background: Vietnam implemented various public health interventions such as contact tracing and testing, mandatory quarantine, and lockdowns in response to coronavirus disease 2019 (COVID-19). However, the effects of these measures on the epidemic remain unclear.Methods: This article describes the public health interventions in relation to COVID-19 incidence. Maximum likelihood estimations were used to assess containment delays (time between symptom onset and start of isolation) and multivariable regression was employed to identify associated factors between interventions and COVID-19 incidence. The effective reproductive numbers (Rt) were calculated based on transmission pairs.Results: Interventions were introduced periodically in response to the epidemic. Overall, 817 (55.4%) among 1474 COVID-19 cases were imported. Based on a serial interval of 8.72 ± 5.65 days, it was estimated that Rt decreased to below 1 (lowest at 0.02, 95% CI 0–0.12) during periods of strict border control and contact tracing, and increased ahead of new clusters. The main method to detect cases shifted over time from passive notification to active case-finding at immigration or in lockdown areas, with containment delays showing significant differences between modes of case detection.Conclusions: A combination of early, strict, and consistently implemented interventions is crucial to control COVID-19. Low-middle income countries with limited capacity can contain COVID-19 successfully using non-pharmaceutical interventions.

【 授权许可】

Unknown