About: The first 100 days of SARS-CoV-2 control in Vietnam

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An Entity of Type : schema:ScholarlyArticle, within Data Space : covidontheweb.inria.fr associated with source document(s)

Attributes	Values
type	Academic Article research paper schema:ScholarlyArticle
isDefinedBy	Covid-on-the-Web dataset
has title	The first 100 days of SARS-CoV-2 control in Vietnam
Creator	Thwaites, Guy Rabaa, Maia Choisy, Marc Chau, Vinh Phuc, Tran Rogier Van Doorn, H Duong, Tran Duc, Dang Thai, Pham Dai Quang, Tran Dinh, Phung Duy Nghia, Ngu Hoang, Ngoc-Anh Khanh, Nguyen Luong, Duong Quang, La Quach, Ha-Linh Research, Covid-19 Tan, Dang Tu, Tran
Source	MedRxiv
abstract	Background: One hundred days after SARS-CoV-2 was first reported in Vietnam on January 23rd, 270 cases have been confirmed, with no deaths. We describe the control measures used and their relationship with imported and domestically-acquired case numbers. Methods: Data on the first 270 SARS-CoV-2 infected cases and the timing and nature of control measures were captured by Vietnam's National Steering Committee for COVID-19 response. Apple and Google mobility data provided population movement proxies. Serial intervals were calculated from 33 infector-infectee pairs and used to estimate the proportion of pre-symptomatic transmission events and time-varying reproduction numbers. Results: After the first confirmed case on January 23rd, the Vietnamese Government initiated mass communications measures, contact tracing, mandatory 14-day quarantine, school and university closures, and progressive flight restrictions. A national lockdown was implemented between April 1st and 22nd. Around 200,000 people were quarantined and 266,122 RT-PCR tests conducted. Population mobility decreased progressively before lockdown. 60% (163/270) of cases were imported; 43% (89/208) of resolved infections were asymptomatic. 21 developed severe disease, with no deaths. The serial interval was 3.24 days, and 27.5% (95% confidence interval, 15.7%-40.0%) of transmissions occurred pre-symptomatically. Limited transmission amounted to a maximum reproduction number of 1.15 (95% confidence interval, 0.37-2.36). No community transmission has been detected since April 15th. Conclusions: Vietnam has controlled SARS-CoV-2 spread through the early introduction of communication, contact-tracing, quarantine, and international travel restrictions. The value of these interventions is supported by the high proportion of asymptomatic cases and imported cases, and evidence for substantial pre-symptomatic transmission.
has issue date	2020-05-16(xsd:dateTime)
bibo:doi	10.1101/2020.05.12.20099242
has license	medrxiv
sha1sum (hex)	2f1b5811fcd4ee9ed9eaf9d1f7de9296c65dfff8
schema:url	https://doi.org/10.1101/2020.05.12.20099242
resource representing a document's title	The first 100 days of SARS-CoV-2 control in Vietnam
resource representing a document's body	covid:2f1b5811fcd4ee9ed9eaf9d1f7de9296c65dfff8#body_text
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