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10.1001/jamainternmed.2021.1644

http://scihub22266oqcxt.onion/10.1001/jamainternmed.2021.1644
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33821922!8025126!33821922
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suck abstract from ncbi


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pmid33821922      JAMA+Intern+Med 2021 ; 181 (7): 913-921
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  • Comparison of Estimated Effectiveness of Case-Based and Population-Based Interventions on COVID-19 Containment in Taiwan #MMPMID33821922
  • Ng TC; Cheng HY; Chang HH; Liu CC; Yang CC; Jian SW; Liu DP; Cohen T; Lin HH
  • JAMA Intern Med 2021[Jul]; 181 (7): 913-921 PMID33821922show ga
  • IMPORTANCE: Taiwan is one of the few countries with initial success in COVID-19 control without strict lockdown or school closure. The reasons remain to be fully elucidated. OBJECTIVE: To compare and evaluate the effectiveness of case-based (including contact tracing and quarantine) and population-based (including social distancing and facial masking) interventions for COVID-19 in Taiwan. DESIGN, SETTING, AND PARTICIPANTS: This comparative effectiveness study used a stochastic branching process model using COVID-19 epidemic data from Taiwan, an island nation of 23.6 million people, with no locally acquired cases of COVID-19 reported for 253 days between April and December 2020. MAIN OUTCOMES AND MEASURES: Effective reproduction number of COVID-19 cases (the number of secondary cases generated by 1 primary case) and the probability of outbreak extinction (0 new cases within 20 generations). For model development and calibration, an estimation of the incubation period (interval from exposure to symptom onset), serial interval (time between symptom onset in an infector-infectee pair), and the statistical distribution of the number of any subsequent infections generated by 1 primary case was calculated. RESULTS: This study analyzed data from 158 confirmed COVID-19 cases (median age, 45 years; interquartile range, 25-55 years; 84 men [53%]). An estimated 55% (95% credible interval [CrI], 41%-68%) of transmission events occurred during the presymptomatic stage. In our estimated analysis, case detection, contact tracing, and 14-day quarantine of close contacts (regardless of symptoms) was estimated to decrease the reproduction number from the counterfactual value of 2.50 to 1.53 (95% CrI, 1.50-1.57), which would not be sufficient for epidemic control, which requires a value of less than 1. In our estimated analysis, voluntary population-based interventions, if used alone, were estimated to have reduced the reproduction number to 1.30 (95% CrI, 1.03-1.58). Combined case-based and population-based interventions were estimated to reduce the reproduction number to below unity (0.85; 95% CrI, 0.78-0.89). Results were similar for additional analyses with influenza data and sensitivity analyses. CONCLUSIONS AND RELEVANCE: In this comparative effectiveness research study, the combination of case-based and population-based interventions (with wide adherence) may explain the success of COVID-19 control in Taiwan in 2020. Either category of interventions alone would have been insufficient, even in a country with an effective public health system and comprehensive contact tracing program. Mitigating the COVID-19 pandemic requires the collaborative effort of public health professionals and the general public.
  • |*Models, Theoretical[MESH]
  • |*Pandemics[MESH]
  • |Adult[MESH]
  • |COVID-19/*epidemiology[MESH]
  • |Communicable Disease Control/*methods[MESH]
  • |Contact Tracing/*methods[MESH]
  • |Female[MESH]
  • |Humans[MESH]
  • |Male[MESH]
  • |Middle Aged[MESH]
  • |Quarantine/*methods[MESH]
  • |SARS-CoV-2[MESH]


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