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10.1038/s41598-020-78760-x

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suck abstract from ncbi


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pmid33495491      Sci+Rep 2021 ; 11 (1): 2145
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  • Cross-country evidence on the association between contact tracing and COVID-19 case fatality rates #MMPMID33495491
  • Yalaman A; Basbug G; Elgin C; Galvani AP
  • Sci Rep 2021[Jan]; 11 (1): 2145 PMID33495491show ga
  • The coronavirus disease (COVID-19) outbreak has killed over a million people since its emergence in late 2019. However, there has been substantial variability in the policies and intensity of diagnostic efforts between countries. In this paper, we quantitatively evaluate the association between national contact tracing policies and case fatality rates of COVID-19 in 138 countries. Our regression analyses indicate that countries that implement comprehensive contact tracing have significantly lower case fatality rates. This association of contact tracing policy and case fatality rates is robust in our longitudinal regression models, even after controlling for the number of tests conducted and non-pharmaceutical control measures adopted by governments. Our results suggest that comprehensive contact tracing is instrumental not only to curtailing transmission but also to reducing case fatality rates. Contact tracing achieves the early detection and isolation of secondary cases which are particularly important given that the peak in infectiousness occurs during the presymptomatic phase. The early detection achieved by contact tracing accelerates the rate at which infected individuals receive medical care they need to maximize their chance of recovery. In addition, the combination of reduced transmission and more rapid recovery diminishes the burden on the healthcare system which in turn ensures that the resources remain available for individuals who do become infected.
  • |*Public Policy[MESH]
  • |COVID-19 Testing/statistics & numerical data[MESH]
  • |COVID-19/diagnosis/*mortality/prevention & control/virology[MESH]
  • |Contact Tracing/*statistics & numerical data[MESH]
  • |Global Health/*statistics & numerical data[MESH]
  • |Humans[MESH]
  • |Pandemics/*prevention & control/statistics & numerical data[MESH]


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