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Research and analysis

Avian influenza (bird flu): epidemiology reports

Investigations carried out to describe and explain cases of avian influenza (bird flu).

Updates to this page

From:
Department for Environment, Food & Rural Affairs and Animal and Plant Health Agency
Published:
12 March 2015
Last updated:
9 April 2026
Show all updates

  1. Added the highly pathogenic avian influenza H5N1 outbreaks in Great Britain for October 2023 to September 2024 report.

  2. Added the highly pathogenic avian influenza H5N1 outbreaks in Great Britain for October 2022 to September 2023 report.

  3. We have added the report 'October 2021 to September 2022: Highly Pathogenic Avian Influenza H5N1 outbreaks in Great Britain'.

  4. We have added a report about two low pathogenicity avian influenza outbreaks (H5N2 and H5N3) in Great Britain, November 2020 to March 2021.

  5. Added November 2020 to April 2021: High pathogenicity avian influenza H5N8 and H5N1 outbreaks in Great Britain report.

  6. Published national epidemiology report on cases of low pathogenic avian influenza H5N3 in Suffolk, December 2019.

  7. Updated June 2017 epidemiology report: The description of IP9 on p24 has been changed from grandparent broiler-breeder unit to broiler-breeder unit, in order to more accurately reflect the nature of the business

  8. Added national epidemiology report on cases of highly pathogenic avian influenza H5N8 on 3 additional infected small-holder premises, April to May 2017.

  9. Added national epidemiology report on cases of highly pathogenic avian influenza H5N8 between December 2016 and March 2017.

  10. Uploaded corrected version of epi report for July 2015 outbreak - fixed unreadable text on page 33 and changed the number of PZ duck holdings on page 34 has been changed from 16 to 15.

  11. Added epidemiology report for H7N7 Low Pathogenic Avian Influenza outbreak in near Preston, Lancashire, July 2015.

  12. First published.

Documents

October 2023 to September 2024: Highly Pathogenic Avian Influenza H5N1 outbreaks in Great Britain

PDF, 980 KB, 20 pages

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October 2022 to September 2023: highly pathogenic avian influenza H5N1 outbreaks in Great Britain

PDF, 3.14 MB, 57 pages

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October 2021 to September 2022: Highly Pathogenic Avian Influenza H5N1 outbreaks in Great Britain

PDF, 15.2 MB, 1025 pages

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November 2020 to March 2021: two low pathogenicity avian influenza outbreaks in Great Britain (H5N2 and H5N3)

PDF, 1.04 MB, 33 pages

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November 2020 to April 2021: High pathogenicity avian influenza H5N8 and H5N1 outbreaks in Great Britain

PDF, 8.66 MB, 234 pages

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January 2020: National epidemiology report: Low Pathogenic Avian Influenza H5N3: Suffolk, December 2019

PDF, 915 KB, 34 pages

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July 2017: National epidemiology report: H5N8 Highly Pathogenic Avian Influenza: 3 additional infected small-holder premises, April to May 2017

PDF, 463 KB, 21 pages

June 2017: National epidemiology report: H5N8 Highly Pathogenic Avian Influenza, December 2016 to March 2017

PDF, 1.03 MB, 51 pages

July 2015: Epidemiology report: H7N7 Highly Pathogenic Avian Influenza outbreak (AIV2015/02) in near Preston, Lancashire

PDF, 1.84 MB, 37 pages

February 2015: Epidemiology report: Low Pathogenic Avian Influenza outbreak (AIV2015/01) in broiler breeder chickens

PDF, 1010 KB, 21 pages

November 2014: Epidemiology report: H5N8 Highly Pathogenic Avian Influenza outbreak (AIV2014/01) in breeding ducks

PDF, 810 KB, 25 pages

November 2014 and February 2015: Lessons learned in outbreak

HTML

November 2014: Key points from meeting on 26 November 2014 meeting to consider HPAI H5N8

PDF, 98 KB, 10 pages

November 2014: Defra response to the key points from meeting on 26 November 2014 to consider HPAI H5N8

PDF, 34.9 KB, 4 pages

Details

The following reports have been published, summarising the epidemiological investigations carried out to describe and explain cases of:

  • H5N2 and H5N3 low pathogenicity avian influenza outbreaks in Great Britain, November 2020 to March 2021
  • H5N3 Low Pathogenic Avian Influenza: Suffolk, December 2019
  • H5N8 Highly Pathogenic Avian Influenza: 3 additional infected small-holder premises, April to May 2017
  • H5N8 Highly Pathogenic Avian Influenza: between December 2016 and March 2017
  • H7N7 Highly Pathogenic Avian Influenza: near Preston, Lancashire, July 2015
  • H7N7 Low Pathogenic Avian Influenza: in broiler breeder chickens, February 2015
  • H5N8 Highly Pathogenic Avian Influenza: in breeding ducks on a premises in Yorkshire, November 2014

We’ve separately published the epidemiology report into the avian influenza case in Dunfermline, Scotland in 2016.

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