Integrated Genomic Surveillance reveals extensive onward transmission of travel-imported SARS-CoV-2 infections in the community

  1. Torsten Houwaart
  2. Samir Belhaj
  3. Emran Tawalbeh
  4. Dirk Nagels
  5. Patrick Finzer
  6. Yara Fröhlich
  7. Assia Benmoumene
  8. Dounia Asskali
  9. Hussein Haidar
  10. Janina von Dahlen
  11. Jessica Nicolai
  12. Lisa Stiller
  13. Jacqueline Blum
  14. Christian Lange
  15. Carla Adelmann
  16. Britta Schroer
  17. Ute Osmers
  18. Christiane Grice
  19. Phillipp P. Kirfel
  20. Hassan Jomaa
  21. Daniel Strelow
  22. Lisanna Hülse
  23. Moritz Pigulla
  24. Pascal Kreuzer
  25. Alona Tyshaieva
  26. Jonas Weber
  27. Tobias Wienemann
  28. Malte Kohns Vasconcelos
  29. Katrin Hoffmann
  30. Nadine Lübke
  31. Sandra Hauka
  32. Marcel Andree
  33. Claus Jürgen Scholz
  34. Nathalie Jazmati
  35. Klaus Göbels
  36. Rainer Zotz
  37. Klaus Pfeffer
  38. Jörg Timm
  39. Lutz Ehlkes
  40. Andreas Walker
  41. Alexander T. Dilthey
  42. German COVID-19 OMICS Initiative (DeCOI)
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Abstract

Integration of genomic surveillance with contact tracing provides a powerful tool for the reconstruction of person-to-person pathogen transmission chains. We report two large clusters of SARS-CoV-2 cases (“Delta” clade, 110 cases combined) detected in July 2021 by Integrated Genomic Surveillance in Düsseldorf. Structured interviews and deep contact tracing demonstrated an association to a single SARS-CoV-2 infected return traveller (Cluster 1) and to return travel from Catalonia and other European countries (Cluster 2), highlighting the importance of containing travel-imported SARS-CoV-2 infections.

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