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Sars-Cov-2 Outbreak in Iran: The Dynamics of the Epidemic and Evidence on Two Independent Introductions Publisher Pubmed



Fattahi Z1, 2 ; Mohseni M1, 2, 3 ; Jalalvand K1 ; Aghakhani Moghadam F1 ; Ghaziasadi A4, 5 ; Keshavarzi F1 ; Yavarian J4 ; Jafarpour A4, 5 ; Mortazavi SE6 ; Ghodratpour F1 ; Behravan H1 ; Khazeni M4, 7 ; Momeni SA7 ; Jahanzad I8 Show All Authors
Authors
  1. Fattahi Z1, 2
  2. Mohseni M1, 2, 3
  3. Jalalvand K1
  4. Aghakhani Moghadam F1
  5. Ghaziasadi A4, 5
  6. Keshavarzi F1
  7. Yavarian J4
  8. Jafarpour A4, 5
  9. Mortazavi SE6
  10. Ghodratpour F1
  11. Behravan H1
  12. Khazeni M4, 7
  13. Momeni SA7
  14. Jahanzad I8
  15. Moradi A9
  16. Tabarraei A9
  17. Azimi SA9
  18. Kord E10
  19. Hashemishahri SM10
  20. Azaran A11
  21. Yousefi F11
  22. Mokhames Z12
  23. Soleimani A12
  24. Ghafari S13
  25. Ziaee M13
  26. Habibzadeh S14
  27. Jeddi F14
  28. Hadadi A15
  29. Abdollahi A16
  30. Kaydani GA17
  31. Soltani S4, 5
  32. Mokhtariazad T4
  33. Najafipour R18
  34. Malekzadeh R19
  35. Kahrizi K1
  36. Jazayeri SM4, 5
  37. Najmabadi H1, 2

Source: Transboundary and Emerging Diseases Published:2022


Abstract

The SARS-CoV-2 virus has been rapidly spreading globally since December 2019, triggering a pandemic, soon after its emergence. While Iran was among the first countries confronted with rapid spread of virus in February 2020, no real-time SARS-CoV-2 whole-genome tracking in early phase of outbreak was performed in the country. To address this issue, we provided 50 whole-genome sequences of viral isolates ascertained from different geographical locations in Iran during March–July 2020. The corresponding analysis on origins, transmission dynamics and genetic diversity of SARS-CoV-2 virus, represented at least two introductions of the virus into the country, constructing two major clusters defined as B.4 and B.1*. The first entry of the virus might have occurred around very late 2019/early 2020, as suggested by the time to the most recent common ancestor, followed by a rapid community transmission that led to dominancy of B.4 lineage in early epidemic till the end of June. Gradually, reduction in dominancy of B.4 occurred possibly as a result of other entries of the virus, followed by surge of B.1* lineages, as of mid-May. Remarkably, variation tracking of the virus indicated the increase in frequency of D614G mutation, along with B.1* lineages, which showed continuity till October 2020. The increase in frequency of D614G mutation and B.1* lineages from mid-May onwards predicts a rapid viral transmission that may push the country into a critical health situation followed by a considerable change in composition of viral lineages circulating in the country. © 2021 Wiley-VCH GmbH.
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