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An illustration comparing prospective tracing only (A) against combined prospective and retrospective tracing (B). In both instances, Index Case #1 and Index Case #2 were infected at an (initially) undetected cluster event and detected through standard disease surveillance. The illustration
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demonstrates how the addition of retrospective tracing can break more transmission chains. In both instances some cases remain undetected due to limitations of contact tracing. This illustration was created by Adam Nagy and is originally
162:. This image is a modification of a schematic originally found in Endo et al. “Implication of backward contact tracing in the presence of overdispersed transmission in COVID-19 outbreak.” Wellcome Open Research, (2020),
274:– You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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Possible results of contact tracing are shown comparing (A) only prospective tracing versus (B) both prospective and retrospective tracing are performed.
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This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
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If the file has been modified from its original state, some details may not fully reflect the modified file.
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Schematic of prospective contact tracing versus prospective and retrospective contact tracing.png
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I, the copyright holder of this work, hereby publish it under the following license:
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Click on a date/time to view the file as it appeared at that time.
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Creative
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Commons is a freely licensed media file repository.
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169:Creative Commons Attribution License
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