Guidance
Respiratory virus circulation: England and Wales
Data showing the seasonality of major respiratory viruses.
Details
These documents highlight the seasonality of major respiratory viruses over time. Data is taken from different sources, including Second Generation Surveillance System (SGSS) and the Royal College of General Practitioners (RCGP).
It can be used for research purposes by healthcare professionals.
Updates to this page
Published 24 July 2014
Last updated
2123 JulyOctober 2025
+ show all updates
23 October 2025
Updated graph in 'Timing of influenza seasons'.
21 July 2025
Updated 'Timing of influenza seasons'.
16 May 2024
Updated for week 14, 2014 and week 15, 2024
15 May 2024
Updated to provide data between week 14, 2014 and week 15, 2024.
14 February 2024
Updated to provide data between week 1, 2014 and week 51, 2023.
22 May 2023
Updated to provide data from week 17, 2013 to week 16, 2023.
28 November 2022
Added report about timing of influenza seasons.
9 May 2022
Updated to provide data from week 18, 2012 to week 16, 2022.
9 August 2021
Added updated graph for week 29.
8 March 2021
Updated graph.
16 October 2020
Updated to provide data from week 1 of 2010 to week 39 of 2020.
19 May 2020
Updated to provide data from week 1 of 2010 and week 18 of 2020.
14 February 2020
Updated to provide data from week 1 of 2010 and week 4 of 2020.
18 September 2019
Updated to include data up to week 23 of 2019.
24 June 2019
Updated to provide data from week 1 of 2009 to week 23 of 2019.
9 April 2019
Added data between week 1, 2009 and week 11, 2019.
7 November 2018
Updated with data between week 1 of 2008, and week 41 of 2018.
22 August 2018
Added data between week 1 of 2008 and week 31 of 2018.
22 March 2018
Graph updated to show data covering week 1 of 2007 until week 10 of 2018.
10 November 2017
Graph updated to show period between week 1 of 2007 and week 44 of 2017.
24 August 2017
Updated graph to show data for week 1 of 2007 and week 32 of 2017.
11 May 2017
Updated document with new figures.
23 December 2016
Updated graph to week 49, 2016.
18 October 2016
Updated with data up to week 40 of 2016.
13 May 2016
Updated 6 major respiratory viruses graph.
27 October 2015
Updated graph with data leading up to week 41 2014, instead of week 44 2014.
19 November 2014
The respiratory pathogen circulation has been updated.
24 July 2014
First published.
Update history
2026-07-21 09:30
2025-10-23 08:19
2025-07-21 09:48
2024-05-16 09:30
2024-05-15 14:59
2024-02-14 11:06
2023-05-22 13:17
2022-11-28 15:14
2022-05-09 11:03