Respiratory surveillance report

Respiratory-Surveillance-Report.knit

Please note this report will be published fortnightly during the summer.

The 2024-25 Annual Respiratory Surveillance Report is available on the Public Health Agency website.

1 Summary

During week 34, influenza and RSV activity remained low and stable, consistent with baseline levels. COVID-19 surveillance indicators are decreasing.

  • There were seven unique episodes of influenza identified (all were Flu A (not subtyped). For COVID-19 there were 103 unique episodes identified.

  • There were 1,208 total influenza tests (0.7% positivity) and 676 RSV tests performed, of which none were positive. For COVID-19, there were 1,226 tests performed (9.2% positivity).

  • There were 175 tests performed for rhinovirus (8.6% positivity), adenovirus (1.1% positivity), parainfluenza (1.7% positivity) and human metapneumovirus (0.6% positivity).

  • The GP influenza/flu-like-illness (flu/FLI) consultation rate was 1.4 per 100,000 population. The GP acute respiratory infection (ARI) consultation rate was 95.3 per 100,000 population. The GP COVID-19 consultation rate was 2.6 per 100,000 population.

  • There were two COVID-19 outbreaks reported in a care home setting to The Public Health Agency (PHA) Health Protection acute response duty room.

  • Of the 51 new admissions, five were Flu A and 46 were COVID-19.

  • Community-acquired emergency influenza, RSV and COVID-19 inpatients have remained stable.

2 Virology surveillance

2.1 Episodes of influenza, RSV and COVID-19

The number of new influenza episodes decreased in week 34, with seven unique episodes identified. There were 15 episodes reported in week 33. There were no new RSV episodes identified in week 34, which is the same as week 33 (Figure 2.1).

Influenza and RSV episode rates by age groups are shown in (Figure 2.2). The highest influenza episode rate in week 34 was in the 0-4 age group (0.9 per 100,000 population).

Influenza and RSV episode rates across local government districts (LGD) are shown in (Figure 2.3). Mid and East Antrim had the highest influenza episode rate in week 34 (2.2 per 100,000 population).

The number of new COVID-19 episodes decreased in week 34, with 103 unique episodes identified compared with 148 in week 33 (Figure 2.1).

COVID-19 episode rates by age groups are shown in (Figure 2.2). The highest COVID-19 episode rate in week 34 was in the 75+ age group (22.4 per 100,000 population).

COVID-19 episode rates across LGD are shown in (Figure 2.3). Causeway Coast and Glens had the highest COVID-19 episode rate in week 34 (7.8 per 100,000 population).

Supplementary tables of unique episodes and weekly episode rates are shown at the end of this report.


Weekly number of unique episodes of influenza, RSV and COVID-19 by epidemiological week

Figure 2.1: Weekly number of unique episodes of influenza, RSV and COVID-19 by epidemiological week


Weekly episode rates of influenza, RSV and COVID-19 per 100,000 population, by age group, by epidemiological week

Figure 2.2: Weekly episode rates of influenza, RSV and COVID-19 per 100,000 population, by age group, by epidemiological week


Weekly episode rates of influenza, RSV and COVID-19 per 100,000 population, by local government district, by epidemiological week

Figure 2.3: Weekly episode rates of influenza, RSV and COVID-19 per 100,000 population, by local government district, by epidemiological week


2.2 Testing and positivity (%)

In week 34 there were 1,208 influenza tests, eight of which were positive (0.7% positivity). This is lower than week 33 (1.2% positivity) (Figure 2.4).

There were 676 RSV tests, of which none were positive . This is similar to week 33 (0.1% positivity) (Figure 2.4).

There were 1,226 COVID-19 tests, 113 of which were positive (9.2% positivity). This is lower than week 33 (11.8% positivity)(Figure 2.4).

There were 175 rhinovirus tests, 15 of which were positive (8.6% positivity). This is lower than week 33 (12.4% positivity) (Figure 2.4).

A supplementary table of testing and positivity is shown at the end of this report.


Weekly positivity for influenza, RSV and COVID-19, by year and epidemiological week

Figure 2.4: Weekly positivity for influenza, RSV and COVID-19, by year and epidemiological week

Shading represents 95% confidence intervals.


In week 34 there were 175 adenovirus tests, two of which were positive (1.1% positivity). This is similar to week 33 (1.8% positivity) (Figure 2.5).

There were 175 parainfluenza tests, three of which were positive (1.7% positivity). This is a decrease compared to week 33 (1.7% positivity) (Figure 2.5).

There were 175 human metapneumovirus (hMPV) tests, one of which was positive (0.6% positivity). This is similar to week 33 (0% positivity) (Figure 2.5).


Weekly positivity for adenovirus, parainfluenza and Human metapneumovirus, by year and epidemiological week

Figure 2.5: Weekly positivity for adenovirus, parainfluenza and Human metapneumovirus, by year and epidemiological week

Shading represents 95% confidence intervals.


2.3 Influenza sub-typing

Of the seven new influenza episodes identified in week 34, all were Flu A (not subtyped) (Figure 2.6).

A supplementary table of influenza sub-typing is shown at the end of this report.


Weekly number of unique episodes of influenza, by subtype and epidemiological week

Figure 2.6: Weekly number of unique episodes of influenza, by subtype and epidemiological week


2.4 Sentinel surveillance

Sentinel surveillance plays a role in monitoring and understanding the spread and impact of respiratory viruses like influenza and COVID-19 in the community. It involves a systematic and targeted approach to collect data from a geographical representative subset of GP practices (~18% population representative) to provide information about virus activity across NI.

In week 34, no samples were positive for influenza, RSV and COVID-19 from three samples submitted for testing to the Regional Virus Laboratory (RVL) (Table 1).

Total sentinel cases of influenza, RSV and COVID-19 by age group for the previous year are shown in (Figure 2.7), (Figure 2.8) and (Figure 2.9), and cumulatively for the 2024/25 influenza season in Table 2.

A supplementary table of testing and positivity is shown at the end of this report.


Table 1. Total sentinel tests and positivity for Influenza, RSV and COVID-19, current week

Total Tests

Total Positives

Positivity (%)

2025 - 34

Influenza

3

0

0

2025 - 34

RSV

3

0

0

2025 - 34

COVID-19

3

0

0


Weekly sentinel influenza cases, by age group, by epidemiological week

Figure 2.7: Weekly sentinel influenza cases, by age group, by epidemiological week


Weekly sentinel RSV cases, by age group, by epidemiological week

Figure 2.8: Weekly sentinel RSV cases, by age group, by epidemiological week


Weekly sentinel COVID-19 cases, by age group, by epidemiological week

Figure 2.9: Weekly sentinel COVID-19 cases, by age group, by epidemiological week


Table 2. Total sentinel cases of Influenza, RSV and COVID-19 by age group, Week 40 - current week, 2024/25

0-4

5-14

15-44

45-64

65-74

75+

Total

Flu A (H1)

22

22

98

62

23

23

250

Flu A (H3)

2

3

12

6

4

1

28

Flu A (not subtyped)

4

1

20

12

1

5

43

Flu B

7

9

87

13

1

1

118

RSV

17

4

13

13

8

11

66

COVID-19

1

0

6

3

6

13

29


2.5 Non-sentinel surveillance

Non-sentinel surveillance is the monitoring of respiratory viruses from virology data collected from settings such as hospitals and GPs (excluding the sentinel GPs). This provides information about virus activity across NI.

In week 34, eight samples were positive for influenza from 1,205 samples submitted for testing to laboratories across NI (0.7% positivity). All were Flu A (not subtyped). No samples were positive for RSV from 673 samples submitted for testing. 133 samples were positive for COVID-19 from 1,223 samples submitted for testing (9.2% positivity) (Table 3).

Total non-sentinel cases of influenza, RSV and COVID-19 by age group for the previous year are shown in (Figure 2.7), (Figure 2.8) and (Figure 2.12), and cumulatively for the 2024/25 influenza season in Table 4.

A supplementary table of testing and positivity is shown at the end of this report.


Table 3. Total non-sentinel tests and positivity for Influenza, RSV and COVID-19, current week

Total Tests

Total Positives

Positivity (%)

2025 - 34

Influenza

1,205

8

0.66

2025 - 34

RSV

673

0

0.00

2025 - 34

COVID-19

1,223

113

9.24


Weekly non-sentinel influenza cases, by age group, by epidemiological week

Figure 2.10: Weekly non-sentinel influenza cases, by age group, by epidemiological week


Weekly non-sentinel RSV cases, by age group, by epidemiological week

Figure 2.11: Weekly non-sentinel RSV cases, by age group, by epidemiological week


Weekly non-sentinel COVID-19 cases, by age group, by epidemiological week

Figure 2.12: Weekly non-sentinel COVID-19 cases, by age group, by epidemiological week


Table 4. Total non-sentinel cases of Influenza, RSV and COVID-19 by age group, Week 40 - current week, 2024/25

0-4

5-14

15-44

45-64

65-74

75+

Total

Flu A (H1)

418

157

262

400

289

767

2,293

Flu A (H3)

64

34

73

73

32

84

360

Flu A (not subtyped)

787

401

578

591

364

783

3,504

Flu B

345

256

619

93

26

53

1,392

RSV

1,346

35

65

110

131

292

1,979

COVID-19

403

81

342

531

610

1,612

3,579


2.6 SARS-CoV-2 variants

In the 8 weeks 23 June 2025 to 17 August 2025, 138 COVID-19 samples were sequenced. Of these, 29 were XFG.3 (21.0% of all sequenced samples), 21 were XFG (15.2% of all sequenced samples), nine were NB.1.8.1 (6.5% of all sequenced samples), six were LP8.1 and XEC (both 4.3% of all sequenced samples), four were JN.1 (2.9% of all sequenced samples), 3 were BA.3 and KP (both 2.2% of all sequenced samples), and 1 was BA.2 and XBB.1.5 (both 0.7% of all sequenced samples) and two were BA.2(1.4% of all sequenced samples). Due to small numbers of samples sequenced, the level of confidence in precision of the estimate is low, and the percentages of each variant may change as further results become available. A more detailed COVID-19 Genomics Bulletin containing a further breakdown of sub-lineages is published weekly.

Parent lineages displayed are subject to change based on lineages under monitoring by the UKHSA horizon scanning team.


Total number of sequenced variants of COVID-19 by Pangolin lineage, by epidemiological week

Figure 2.13: Total number of sequenced variants of COVID-19 by Pangolin lineage, by epidemiological week

Recombinant refers to any recombinant lineage, starting “X”, that does not fall under the parent lineage of a defined variant.


3 Primary care surveillance

3.1 Consultation rates for influenza/influenza-like-illness (‘flu/ILI’)

The general practice (GP) flu/ILI consultation rate during week 34 was 1.4 per 100,000 population. This is lower than week 33 (1.7 per 100,000 population). Rates are at baseline activity levels (<10.1 per 100,000 population) (Figure 3.1).

The highest rate in week 34 was seen in both the 45-64 and 65-74 year old age group (2.0 per 100,000 population) (Figure 3.2).

The highest rate in week 34 was seen in the Western Trust (2.6 per 100,000 population) (Figure 3.3).

Supplementary tables of GP consultation rates are shown at the end of this report.


Northern Ireland GP consultation rates for ‘flu/ILI’, 2021/22 – 2024/25

Figure 3.1: Northern Ireland GP consultation rates for ‘flu/ILI’, 2021/22 – 2024/25


GP consultation rates for ‘flu/ILI’, by age group, 2021/22 – 2024/25

Figure 3.2: GP consultation rates for ‘flu/ILI’, by age group, 2021/22 – 2024/25


GP consultation rates for ‘flu/ILI’, by HSCT, 2021/22 – 2024/25

Figure 3.3: GP consultation rates for ‘flu/ILI’, by HSCT, 2021/22 – 2024/25


3.2 Consultation rates for acute respiratory infection (ARI)

The GP ARI consultation rate during week 34 was 95.3 per 100,000 population. This is similar to week 33 (96.1 per 100,000 population) (Figure 3.4).

The highest rate in week 34 was seen in the 0-4 age group (235.2 per 100,000 population) (Figure 3.5).

The highest rate in week 34 was seen in the Western Trust (127.0 per 100,000 population) (Figure 3.6).

Supplementary tables of GP consultation rates are shown at the end of this report.


Northern Ireland GP consultation rates for ARI, 2021/22 – 2024/25

Figure 3.4: Northern Ireland GP consultation rates for ARI, 2021/22 – 2024/25


GP consultation rates for ARI, by age group, 2021/22 – 2024/25

Figure 3.5: GP consultation rates for ARI, by age group, 2021/22 – 2024/25


GP consultation rates for ARI, by HSCT, 2021/22 – 2024/25

Figure 3.6: GP consultation rates for ARI, by HSCT, 2021/22 – 2024/25


3.3 Consultation rates for COVID-19

The GP COVID-19 consultation rate during week 34 was 2.6 per 100,000 population. This is lower than week 33 (3.7 per 100,000 population) (Figure 3.7).

The highest rate in week 34 was seen in the 75+ age group (10.0 per 100,000 population) (Figure 3.8).

The highest rate in week 34 was seen in the Western Trust (5.0 per 100,000 population) (Figure 3.9).

Supplementary tables of GP consultation rates are shown at the end of this report.


Northern Ireland GP consultation rates for COVID-19, 2021/22 – 2024/25

Figure 3.7: Northern Ireland GP consultation rates for COVID-19, 2021/22 – 2024/25


GP consultation rates for COVID-19, by age group, 2021/22 – 2024/25

Figure 3.8: GP consultation rates for COVID-19, by age group, 2021/22 – 2024/25


GP consultation rates for COVID-19, by HSCT, 2021/22 – 2024/25

Figure 3.9: GP consultation rates for COVID-19, by HSCT, 2021/22 – 2024/25


4 Community surveillance

4.1 Influenza, RSV and COVID-19 care homes outbreaks

There were two outbreaks reported in a care home setting in week 34. This is lower than week 33 (seven COVID-19 outbreaks reported) (Figure 4.1).


Weekly number of confirmed influenza, RSV and COVID-19 outbreaks, by year and epidemiological week

Figure 4.1: Weekly number of confirmed influenza, RSV and COVID-19 outbreaks, by year and epidemiological week


5 Secondary care surveillance

5.1 Admissions and occupancy

There were 51 new community-acquired emergency hospital admissions during week 34 (Figure 5.1). This is a decrease compared to week 33 (70 admissions). Of the 51 new admissions, five were Flu A and 46 were COVID-19.

The 75+ age group had the majority of community acquired emergency COVID-19 hospital admissions in week 34

A supplementary table of community-acquired emergency hospital admissions is shown at the end of this report.

Community-acquired emergency influenza, RSV and COVID-19 inpatients have remained stable (Figure 5.2).


Weekly number of community-acquired emergency influenza, RSV and COVID-19 hospital admissions, by year and epidemiological week

Figure 5.1: Weekly number of community-acquired emergency influenza, RSV and COVID-19 hospital admissions, by year and epidemiological week


Influenza, RSV and COVID-19 community acquired emergency inpatients, by day

Figure 5.2: Influenza, RSV and COVID-19 community acquired emergency inpatients, by day


6 Mortality surveillance

6.3 Excess Mortality

NISRA use the UK-wide methodology to report on excess deaths as advised by the Office for National Statistics (ONS).

EuroMOMO is a European mortality monitoring activity, aiming to detect and measure excess deaths related to seasonal influenza, pandemics and other public health threats. Reports on excess deaths across Europe and the United Kingdom are published weekly.

7 Vaccine Uptake

Data for the COVID-19 Spring 2025 vaccination campaign is available in the COVID-19 Spring 2025 Vaccination Surveillance report.

8 Methods

8.1 Presentation of data

Unless otherwise stated, data are presented using epidemiological weeks (a standardised method of counting weeks [Monday-Sunday] to allow for the comparison of data year after year). This is dependent on the data available. The data included in this report are the most up to date data available at the time of the report; however, this is subject to change as the data are subject to ongoing quality assurance.

8.2 Virology surveillance

All virology data provided here are preliminary. Virology data for prior weeks, as included in this or future reports, are subject to updates based on laboratory returns received after the last report was produced. The current report offers the most current information available.

Rates per 100,000 population are calculated using the NISRA 2021 Mid-Year Population Estimates.

8.2.1 Episodes of infection

Influenza

Influenza episodes are defined by a 42-day (6-week) period from the date of the first positive test result (utilising any test method, including PCR and Point of Care Tests, or source of sample, including hospital, GP, other source), with the episode beginning with the earliest positive specimen date. Subsequent positive specimen dates for the same individual within 42 days of the last are included in the one episode. Positive specimens for the same individual more than 42 days after the last are counted in a separate episode.

RSV

RSV episodes are defined by a 14-day (2-week) period from the date of the first positive test result (utilising any test method, including PCR and Point of Care Tests, or source of sample, including hospital, GP, other source), with the episode beginning with the earliest positive specimen date. Subsequent positive specimen dates for the same individual within 14 days of the last are included in the one episode. Positive specimens for the same individual more than 14 days after the last are counted in a separate episode.

COVID-19

COVID-19 episodes are defined by a rolling 90-day period between positive test results (any test method, sourced from the NI COVID-19 combined testing register), with the episode beginning with the earliest positive specimen date. Subsequent positive specimen dates for the same individual within 90 days of the last are included in the one episode. Positive specimens for the same individual more than 90 days after the last are counted in a separate episode.

8.2.2 Testing and positivity (%)

Influenza, RSV, COVID-19, rhinovirus, adenovirus, parainfluenza and human metapneumovirus

Instead of utilising an episode-based approach, the data is analysed on an epidemiological week basis. Within each epidemiological week, an individual is limited to one influenza test, whether positive or negative. If an individual tests positive for influenza during a specific epidemiological week and subsequently tests positive again within the same week, the second positive test is not counted. Regardless of whether it occurs before or after a negative test within the same epidemiological week, a positive test always takes precedence and is recorded. Similarly, only the first test of multiple negative results is counted for each individual within any given epidemiological week. This helps prevent the double-counting of tests, particularly for individuals who may be hospitalised and routinely tested.

Weekly test positivity is calculated as the proportion of positive tests to total tests conducted. To estimate the uncertainty around these proportions, 95% confidence intervals (CIs) were computed using the Wilson score interval. The Wilson method is a binomial proportion CI that avoids the limitations of some other methods, particularly for small sample sizes or extreme proportions. It provides more accurate bounds by incorporating the standard error and adjusting for asymmetry in the binomial distribution. This method ensures that the plotted CIs reflect the true statistical uncertainty in weekly positivity estimates.

The same methodology is applied when analysing RSV, COVID-19, rhinovirus, adenovirus, parainfluenza and human metapneumovirus data.

Sentinel surveillance

The Public Health Agency works with GPs to deliver a community-based surveillance programme for respiratory infections in NI. The programme provides valuable intelligence about the circulation of respiratory viruses in NI to inform health and social care system planning and preparedness. Participation involves taking nasal/throat swabs from some symptomatic patients who agree to have a swab, and who attend (in person) with ILI, ARI or suspected COVID-19. Testing is opportunistic and within 10 days of symptom onset. Swabs are tested for influenza, RSV and COVID-19 at the RVL and surveillance is year-round.

8.3 SARS-CoV-2 genomics

A subset of SARS-CoV-2 positive PCR samples are sent to sequencing laboratories in Belfast Health and Social Care Trust and Queen’s University Belfast for sequencing. On 29th November the lineage assignment algorithm was switched from PangoLEARN to UShER for lineage counts. PangoLEARN uses a machine learning algorithm, whereas UShER uses phylogenetic placement and produces fewer unassigned lineages. This switch has been applied retrospectively, therefore total counts for all lineages have been affected. A more detailed COVID-19 Genomics Bulletin containing a further breakdown of sub-lineages is published weekly.

8.4 Primary care surveillance

Consultation rates for influenza/influenza-like-illness (‘flu/ILI’), acute respiratory infection (ARI) and COVID-19

GP in-hours consultation data with ~95% coverage of the NI population is auto-extracted weekly from GPIP. This data includes weekly aggregate consultations for ‘flu/ILI’, ARI, and COVID-19, and includes weekly registered patients. The data is available for different Health and Social Care Trusts, and by age and sex.

8.5 Community surveillance

Care home outbreaks

PHA conducts surveillance of outbreaks across multiple settings, including care homes (nursing homes and residential homes) in NI that are registered with the Regulation and Quality Improvement Agency. All care homes have a requirement to notify the PHA Health Protection duty room of suspected outbreaks of any infectious disease. A confirmed outbreak of influenza or RSV can be defined as where there are two or more confirmed cases with onset within a 14 day period, where transmission within the Care Home facility is considered the likely cause.

8.6 Secondary care surveillance

Admissions and occupancy

It is not currently possible for this report to distinguish emergency from other types of admission for each Trusts hospital data following the introduction of a new electronic healthcare record. This was introduced in the SEHSCT on 06/11/2023; BHSCT on 06/06/2024, NHSCT on 07/11/2024, and WHSCT and SHSCT on 28/04/2025. For this report, all community-acquired admissions are included from the respective dates above for each Trust, which will include non-emergency admissions (which are a small minority of the total admissions reported). Only admissions where the method of admission was ‘Emergency’ are counted before these dates for each Trust. Work is ongoing to adapt systems to new data sources and re-instate differentiation of emergency admissions. Ongoing developmental and quality assurance work may result in adjustments to figures.

Influenza and RSV

Community-acquired influenza and RSV emergency admissions to acute hospitals are estimated by combining data from PAS and virological reports in NIHAP. Admissions are counted where there was a positive test up to seven days before admission or up to one day after admission, and the method of admission was ‘Emergency’. The number of inpatients is counted at midnight. Admissions and occupancy refer to the first admission per infection episode.

COVID-19

Community-acquired COVID-19 emergency admissions are estimated by combining data from the NI COVID-19 Combined Testing Register and hospital admission information. Admissions are counted where there was a positive PCR or lateral flow test up to 14 days before admission or up to one day after admission. The number of inpatients is counted at midnight. Admissions and occupancy refer to the first admission per infection episode, including transfers between hospitals. The method used in this report is different to that previously reported by the Department of Health’s COVID-19 dashboard, which used administrative coding to identify COVID-19 admissions.

8.7 Mortality surveillance

NISRA death statistics are published weekly, and include weekly counts of deaths related to influenza and/or pneumonia (new from 31 January 2025), and deaths related to COVID-19. This enables comparisons with weekly information published by the Office for National Statistics (ONS) covering England and Wales.

The statistics report on deaths where influenza and/or pneumonia, or COVID-19, was mentioned anywhere on the death certificate. As a result, the counts will reflect deaths where these diseases have contributed to a death but was not necessarily the underlying cause of the death.

9 Supplementary tables

9.1 Unique episodes of influenza, RSV and COVID-19, by epidemiological week, over a six week period

Year and week

Unique episodes

2025 - 29

Influenza A

2

Influenza B

0

RSV

2

COVID-19

107

2025 - 30

Influenza A

4

Influenza B

0

RSV

0

COVID-19

116

2025 - 31

Influenza A

8

Influenza B

0

RSV

1

COVID-19

112

2025 - 32

Influenza A

12

Influenza B

0

RSV

2

COVID-19

121

2025 - 33

Influenza A

15

Influenza B

0

RSV

0

COVID-19

148

2025 - 34

Influenza A

7

Influenza B

0

RSV

0

COVID-19

103

9.2 Influenza, RSV and COVID-19 episode rates per 100,000 population, by age group, over a six week period

2025 - 29

2025 - 30

2025 - 31

2025 - 32

2025 - 33

2025 - 34

0-4

Influenza

0.0

0.9

0.0

1.8

0.9

0.9

RSV

1.8

0.0

0.0

1.8

0.0

0.0

COVID-19

15.0

13.3

15.0

25.7

22.1

20.3

5-14

Influenza

0.0

0.0

0.0

0.4

0.4

0.0

RSV

0.0

0.0

0.0

0.0

0.0

0.0

COVID-19

0.4

0.4

0.8

0.4

2.0

2.8

15-44

Influenza

0.0

0.0

0.1

0.3

0.1

0.3

RSV

0.0

0.0

0.0

0.0

0.0

0.0

COVID-19

0.8

2.0

1.4

2.2

2.5

2.4

45-64

Influenza

0.0

0.0

0.4

0.4

0.2

0.4

RSV

0.0

0.0

0.0

0.0

0.0

0.0

COVID-19

3.2

5.1

4.4

2.4

3.6

1.8

65-74

Influenza

1.1

1.7

1.1

1.1

2.3

0.6

RSV

0.0

0.0

0.6

0.0

0.0

0.0

COVID-19

9.0

9.0

10.7

7.3

15.8

7.3

75+

Influenza

0.0

0.0

2.0

2.0

4.6

0.7

RSV

0.0

0.0

0.0

0.0

0.0

0.0

COVID-19

33.7

29.7

27.7

33.0

35.6

22.4

9.3 Influenza, RSV and COVID-19 episode rates per 100,000 population, by local government district, over a six week period

2025 - 29

2025 - 30

2025 - 31

2025 - 32

2025 - 33

2025 - 34

Antrim and Newtownabbey

Influenza

0.0

0.0

0.0

1.4

0.0

0.7

RSV

0.0

0.0

0.0

0.0

0.0

0.0

COVID-19

6.2

13.0

6.2

6.9

6.2

4.1

Ards and North Down

Influenza

0.0

0.0

0.6

1.2

3.1

0.0

RSV

0.0

0.0

0.0

0.0

0.0

0.0

COVID-19

3.7

6.7

6.1

6.1

7.3

4.3

Armagh City, Banbridge and Craigavon

Influenza

0.0

0.5

0.9

0.9

1.8

0.0

RSV

0.0

0.0

0.0

0.0

0.0

0.0

COVID-19

4.6

3.2

6.8

6.4

11.4

3.2

Belfast

Influenza

0.3

0.0

0.6

0.0

0.3

0.3

RSV

0.3

0.0

0.0

0.6

0.0

0.0

COVID-19

3.5

3.5

4.9

4.1

6.4

7.2

Causeway Coast and Glens

Influenza

0.0

0.7

0.0

0.0

0.7

1.4

RSV

0.0

0.0

0.0

0.0

0.0

0.0

COVID-19

10.6

9.9

5.6

7.8

10.6

7.8

Derry City and Strabane

Influenza

0.0

0.7

0.0

0.0

0.7

0.0

RSV

0.0

0.0

0.0

0.0

0.0

0.0

COVID-19

6.0

4.6

4.0

4.0

8.0

5.3

Fermanagh and Omagh

Influenza

0.0

0.9

0.0

0.0

0.0

0.0

RSV

0.0

0.0

0.0

0.0

0.0

0.0

COVID-19

3.4

5.1

3.4

7.7

6.8

4.3

Lisburn and Castlereagh

Influenza

0.7

0.0

0.7

0.7

0.0

0.0

RSV

0.7

0.0

0.0

0.0

0.0

0.0

COVID-19

5.4

4.0

4.7

7.4

7.4

4.0

Mid and East Antrim

Influenza

0.0

0.0

0.0

1.4

1.4

2.2

RSV

0.0

0.0

0.7

0.0

0.0

0.0

COVID-19

10.1

8.6

8.6

6.5

5.8

7.2

Mid Ulster

Influenza

0.0

0.0

0.0

0.0

0.7

0.0

RSV

0.0

0.0

0.0

0.0

0.0

0.0

COVID-19

2.7

6.0

8.6

7.3

7.3

6.0

Newry, Mourne and Down

Influenza

0.0

0.0

1.1

1.6

0.0

0.0

RSV

0.0

0.0

0.0

0.0

0.0

0.0

COVID-19

8.8

7.1

6.0

7.7

8.2

4.4

Northern Ireland

Influenza

0.1

0.2

0.4

0.6

0.8

0.4

RSV

0.1

0.0

0.1

0.1

0.0

0.0

COVID-19

5.6

6.1

5.9

6.4

7.8

5.4

9.4 Total tests and positivity for influenza, RSV and COVID-19, by epidemiological week, over a six week period

Year and Week

Total Tests

Total Positives

Positivity (%)

2025 - 29

Influenza

1,278

2

0.16

RSV

730

2

0.27

COVID-19

1,346

129

9.58

2025 - 30

Influenza

1,182

4

0.34

RSV

706

0

0.00

COVID-19

1,333

131

9.83

2025 - 31

Influenza

1,256

8

0.64

RSV

735

1

0.14

COVID-19

1,346

134

9.96

2025 - 32

Influenza

1,231

12

0.97

RSV

733

3

0.41

COVID-19

1,267

135

10.66

2025 - 33

Influenza

1,307

15

1.15

RSV

758

0

0.00

COVID-19

1,345

159

11.82

2025 - 34

Influenza

1,208

8

0.66

RSV

676

0

0.00

COVID-19

1,226

113

9.22

9.5 Unique episodes of influenza, by subtype, over a six week period

Year and week

Flu A (H1)

Flu A (H3)

Flu A (not subtyped)

Flu B

2025 - 29

1

1

0

0

2025 - 30

0

0

4

0

2025 - 31

2

0

6

0

2025 - 32

2

0

10

0

2025 - 33

3

3

9

0

2025 - 34

0

0

7

0

9.6 Total sentinel tests and positivity for influenza, RSV and COVID-19, by epidemiological week, over a six week period

Year and Week

Total Tests

Total Positives

Positivity (%)

2025 - 29

Influenza

1

0

0.00

RSV

1

0

0.00

COVID-19

1

0

0.00

2025 - 30

Influenza

2

0

0.00

RSV

2

0

0.00

COVID-19

2

1

50.00

2025 - 31

Influenza

2

0

0.00

RSV

2

0

0.00

COVID-19

2

1

50.00

2025 - 32

Influenza

4

0

0.00

RSV

4

0

0.00

COVID-19

4

1

25.00

2025 - 33

Influenza

7

1

14.29

RSV

7

0

0.00

COVID-19

7

2

28.57

2025 - 34

Influenza

3

0

0.00

RSV

3

0

0.00

COVID-19

3

0

0.00

9.7 Total non-sentinel tests and positivity for influenza, RSV and COVID-19, by epidemiological week, over a six week period

Year and Week

Total Tests

Total Positives

Positivity (%)

2025 - 29

Influenza

1,277

2

0.16

RSV

729

2

0.27

COVID-19

1,345

129

9.59

2025 - 30

Influenza

1,180

4

0.34

RSV

704

0

0.00

COVID-19

1,331

130

9.77

2025 - 31

Influenza

1,254

8

0.64

RSV

733

1

0.14

COVID-19

1,344

133

9.90

2025 - 32

Influenza

1,227

12

0.98

RSV

729

3

0.41

COVID-19

1,263

134

10.61

2025 - 33

Influenza

1,300

14

1.08

RSV

751

0

0.00

COVID-19

1,338

157

11.73

2025 - 34

Influenza

1,205

8

0.66

RSV

673

0

0.00

COVID-19

1,223

113

9.24

9.8 Number of sequenced samples for variants in Northern Ireland

Parent Lineage

Cumulative Number Sequenced

BA.2

6

BA.3

16

JN.1

49

KP

43

KP.3

291

LP.8.1

97

NB.1.8.1

36

Unassigned

162

XBB.1.5

2

XEC

217

XFG

21

XFG.3

42

This table only shows counts for lineages with 10 or more sequenced samples from epidemiological year-week 2024 - 34 onwards. Lineage counts include provisional and confirmed sequencing samples. Lineage calls are subject to change following analysis of genomic sequence results, which may result in fluctuations in lineage counts.

9.9 Flu/ILI consultation rates per 100,000 population, by age group, over a six week period

0-4

5-14

15-44

45-64

65-74

75+

2025 - 29

0.00

0.00

1.35

1.48

1.54

4.74

2025 - 30

0.00

0.00

1.35

1.30

1.02

0.59

2025 - 31

0.98

0.39

2.59

1.85

0.51

1.18

2025 - 32

1.96

0.39

1.60

2.59

4.09

2.96

2025 - 33

0.98

0.00

1.72

1.48

3.07

4.14

2025 - 34

0.00

0.00

1.72

2.04

2.04

0.59

9.10 Flu/ILI consultation rates per 100,000 population, by Health and Social Care Trust, over a six week period

Belfast

Northern

South Eastern

Southern

Western

Northern Ireland

2025 - 29

1.55

1.01

1.65

1.41

1.76

1.45

2025 - 30

0.66

1.01

1.93

0.94

0.59

1.01

2025 - 31

1.55

1.22

0.55

2.12

3.51

1.73

2025 - 32

1.99

2.03

2.48

2.12

1.76

2.07

2025 - 33

1.77

0.81

2.48

2.12

1.76

1.73

2025 - 34

0.88

1.22

1.37

1.41

2.63

1.44

9.11 ARI consultation rates per 100,000 population, by age group, over a six week period

0-4

5-14

15-44

45-64

65-74

75+

2025 - 29

257.11

66.46

62.08

83.26

109.68

170.61

2025 - 30

230.85

64.94

74.16

92.89

140.86

198.39

2025 - 31

252.51

63.40

70.81

91.03

124.40

155.05

2025 - 32

235.89

61.46

71.53

81.74

122.27

167.40

2025 - 33

233.05

55.63

69.94

87.48

132.42

186.24

2025 - 34

235.23

60.69

72.62

83.38

134.37

165.41

9.12 ARI consultation rates per 100,000 population, by Health and Social Care Trust, over a six week period

Belfast

Northern

South Eastern

Southern

Western

Northern Ireland

2025 - 29

80.46

92.54

77.59

78.70

132.62

91.05

2025 - 30

98.81

96.80

86.66

87.42

148.14

101.99

2025 - 31

97.47

88.25

99.57

78.21

123.54

96.00

2025 - 32

102.74

84.38

90.48

73.24

123.51

93.61

2025 - 33

98.32

90.05

95.15

79.83

123.21

96.11

2025 - 34

94.96

88.00

90.18

83.10

127.01

95.32

9.13 COVID-19 consultation rates per 100,000 population, by age group, over a six week period

0-4

5-14

15-44

45-64

65-74

75+

2025 - 29

2.93

0.00

0.49

2.78

4.10

4.15

2025 - 30

2.93

0.78

0.62

2.41

5.63

8.29

2025 - 31

3.91

0.39

1.60

2.78

3.58

5.92

2025 - 32

7.83

0.00

2.34

2.41

5.63

7.69

2025 - 33

3.92

0.00

1.35

4.63

7.16

13.60

2025 - 34

2.94

0.00

0.86

2.59

6.64

10.04

9.14 COVID-19 consultation rates per 100,000 population, by Health and Social Care Trust, over a six week period

Belfast

Northern

South Eastern

Southern

Western

Northern Ireland

2025 - 29

2.21

0.81

1.93

2.59

1.46

1.78

2025 - 30

2.43

2.23

2.75

3.06

0.88

2.31

2025 - 31

2.43

1.62

1.93

3.53

2.63

2.41

2025 - 32

2.43

2.84

2.75

4.24

3.22

3.08

2025 - 33

2.21

2.64

4.95

4.71

4.68

3.71

2025 - 34

1.77

1.01

2.75

3.30

4.97

2.60

9.15 Number of community-acquired emergency hospital admissions, over a six week period

Year and week

Flu A

Flu B

RSV

COVID-19

Total Admissions

2025 - 29

1

0

1

39

41

2025 - 30

3

0

0

48

51

2025 - 31

6

0

0

43

49

2025 - 32

4

0

3

47

54

2025 - 33

10

0

0

60

70

2025 - 34

5

0

0

46

51