Effect of Nonpharmaceutical Interventions on Transmission of Severe Acute Respiratory Syndrome Coronavirus 2, South Korea, 2020

Comparison of antiviral effect for mild-to-moderate COVID-19 cases between lopinavir/ritonavir versus hydroxychloroquine: A nationwide propensity score-matched cohort study

“…Early (within 7 days from symptom onset) initiation of antiviral therapy may be critical in reducing SARS-CoV-2 viral load, as previously noted ( Fu et al, 2020 , Keyaerts et al, 2004 , Yan et al, 2020a , Yan et al, 2020b ). Due to the limitation of our database, it was difficult to know the initiation timing of antiviral treatment in each individual patient; however, the government of South Korea had launched a series of aggressive measures to perform tight contact tracing and mass screening tests, which enabled early diagnosis within 3–5 days from symptom onset ( Ryu et al, 2020 ). Based on the expert’s guideline, most patients were treated within 7 days after symptom development ( Kim et al, 2020 ).…”

Clustering and superspreading potential of SARS-CoV-2 infections in Hong Kong

“…Superspreading events (SSEs) have characterized previous epidemics of severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome coronavirus (MERS-CoV) infections [1][2][3][4][5][6] . For SARS-CoV-2, the degree to which SSEs are involved in transmission remains unclear, but there is growing evidence that SSEs might be a typical feature of COVID-19 7,8 . Using contact tracing data from 1,038…”

Incubation period of the coronavirus disease 2019 (COVID-19) in Busan, South Korea

“…As of the 10 th of June 2020, South Korea has experienced the large outbreak of coronavirus disease 2019 (COVID-19) [1]. The first COVID-19 cases were identified on 20 January 2020 from individuals travelling from China to South Korea [2].…”