ArticleClinical infectious diseases : an official publication of the Infectious Diseases Society of America2021
The First 100 Days of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Control in Vietnam.
Article in Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers, 6 of them syntheses that pooled it.
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50 citing papers in PubMed, 6 syntheses or guidelines pooled it.
- Effectiveness of testing, contact tracing and isolation interventions among the general population on reducing transmission of SARS-CoV-2: a systematic review.Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2023Pooled it
- Assessing changes in incubation period, serial interval, and generation time of SARS-CoV-2 variants of concern: a systematic review and meta-analysis.BMC medicine · 2023Pooled it
- Occurrence and transmission potential of asymptomatic and presymptomatic SARS-CoV-2 infections: Update of a living systematic review and meta-analysis.PLoS medicine · 2022Pooled it
- Public health effects of travel-related policies on the COVID-19 pandemic: A mixed-methods systematic review.The Journal of infection · 2021Pooled it
- Asymptomatic SARS-CoV-2 infection: A systematic review and meta-analysis.Proceedings of the National Academy of Sciences of the United States of America · 2021Pooled it
- Presymptomatic transmission of SARS-CoV-2 infection: a secondary analysis using published data.BMJ open · 2021Pooled it
- COVID-19 vaccine acceptance and uptake in Indonesia, Nepal, and Vietnam: Key lessons from a qualitative study.PLOS global public health · 2026Article
- Review
- Impact of imported COVID-19 cases on South Korea's response: variant transitions and regional patterns (2020-2023).BMC infectious diseases · 2025Article
- The latency time of SARS-CoV- 2 Delta variant in infection- and vaccine-naive individuals from Vietnam.BMC infectious diseases · 2025Article
- Detection of co-infection and recombination cases with Omicron and local Delta variants of SARS-CoV-2 in Vietnam.Scientific reports · 2024Article
- Estimating Asymptomatic and Symptomatic Transmission of the COVID-19 First Few Cases in Selenge Province, Mongolia.Influenza and other respiratory viruses · 2024Article
- Ensuring Continuity of Tuberculosis Care during Social Distancing through Integrated Active Case Finding at COVID-19 Vaccination Events in Vietnam: A Cohort Study.Tropical medicine and infectious disease · 2024Article
- Acceptance and User Experiences of a Wearable Device for the Management of Hospitalized Patients in COVID-19-Designated Wards in Ho Chi Minh City, Vietnam: Action Learning Project.JMIR human factors · 2024Article
- COVID-19 Vaccine Acceptance and Hesitancy among Healthcare Workers in Lusaka, Zambia; Findings and Implications for the Future.Vaccines · 2023Article
- Shift from a Zero-COVID strategy to a New-normal strategy for controlling SARS-COV-2 infections in Vietnam.Epidemiology and infection · 2023Article
- Enhancing human resilience beyond COVID-19-related stress: public responses to multi-benefits of home gardening.Scientific reports · 2023Article
- Impact of Lockdown Measures on Health Outcomes of Adults with Type 2 Diabetes Mellitus in Bangladesh.Healthcare (Basel, Switzerland) · 2023Article
- COVID-19 vaccine uptake and associated factors among adolescents and youths: Findings and implications for future vaccination programmes.PLOS global public health · 2023Article
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Abstract
backgroundOne hundred days after severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was first reported in Vietnam on 23 January, 270 cases were confirmed, with no deaths. We describe the control measures used by the government and their relationship with imported and domestically acquired case numbers, with the aim of identifying the measures associated with successful SARS-CoV-2 control.
methodsClinical and demographic data on the first 270 SARS-CoV-2 infected cases and the timing and nature of government control measures, including numbers of tests and quarantined individuals, were analyzed. Apple and Google mobility data provided proxies for population movement. Serial intervals were calculated from 33 infector-infectee pairs and used to estimate the proportion of presymptomatic transmission events and time-varying reproduction numbers.
resultsA national lockdown was implemented between 1 and 22 April. Around 200 000 people were quarantined and 266 122 reverse transcription polymerase chain reaction (RT-PCR) tests conducted. Population mobility decreased progressively before lockdown. In total, 60% (163/270) of cases were imported; 43% (89/208) of resolved infections remained asymptomatic for the duration of infection. The serial interval was 3.24 days, and 27.5% (95% confidence interval [CI], 15.7%-40.0%) of transmissions occurred presymptomatically. Limited transmission amounted to a maximum reproduction number of 1.15 (95% CI, .·37-2.·36). No community transmission has been detected since 15 April.
conclusionsVietnam has controlled SARS-CoV-2 spread through the early introduction of mass communication, meticulous contact tracing with strict quarantine, and international travel restrictions. The value of these interventions is supported by the high proportion of asymptomatic and imported cases, and evidence for substantial presymptomatic transmission.
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