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Statewide Weekly Influenza Surveillance Report

Reporting Period: ISO weeks 1–41 (31 December 2018 to 13 October 2019)

Summary

* 2019 year to date (YTD) includes recent week commencing ISO week 1 of the year – week commencing 31 December 2018 † Subtype counts/proportions may be subject to change as further laboratory results become available ‡ Queensland public hospitals only, includes general and ICU admissions § New admissions to ICU during the reporting period ǁ Public laboratories only Australian Influenza Vaccine Committee (AIVC) decision on the influenza vaccine composition for the Australian 2019 season http://www.influenzacentre.org/surveillance_vaccines.htm

Trivalent vaccine A/Michigan/45/2015 (H1N1) pdm09-like virus A/Switzerland/8060/2017 (H3N2)-like virus B/Phuket/3073/2013-like (B/Yamagata/16/88 lineage)

Quadrivalent vaccine Viruses listed above, plus the additional B virus:

B/Colorado/06/2017-like virus (B/Victoria/2/87 lineage) For influenza comments, see weekly report summary page: https://www.health.qld.gov.au/clinical-practice/guidelines-procedures/diseases-infection/surveillance/reports/notifiable/summary

2019 year to date*

Previous Week (30 September–

6 October)

Recent Week(7 October–13 October)

All influenza notifications 66,135 766 389Influenza A† 54,001 519 251 A(H1N1) 970 9 2 A(H3N2) 2,867 27 7 Subtype Unavailable 50,164 483 242Influenza B 12,134 247 138 Victoria 191 1 0 Yamagata 14 0 0 Lineage Unavailable 11,929 246 138Type unavailable 0 0 0Influenza hospitalisations‡ 3,012 41 16 Intensive Care (ICU) admissions§ 297 2 3Percentage of tests positiveǁ 19.4 11.2 6.9

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Figure 1 Laboratory confirmed influenza notifications in Queensland, by ISO week* and month of onset, 30 December 2013 to 13 October 2019.

*ISO w eek 1 of each year commenced on the follow ing dates: 2014 – 30 December 2013; 2015 – 29 December 2014; 2016 – 4 January 2016; 2017 – 2 January 2017; 2018 – 1 January 2018; 2019 – 31 December 2018

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Figure 2 Queensland weekly influenza notifications by type and percentage of positive tests (public laboratory system only) by ISO week and month of testing, 31 December 2018 to 13 October 2019.

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Figure 3 Queensland regional influenza notifications by ISO week and month of onset, 31 December 2018 to 13 October 2019.

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Figure 4 Queensland YTD 2019 influenza notifications by age group, sex, and age group specific notification rate, 31 December 2018 to 13 October 2019.

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Figure 5 Percentage of positive influenza, respiratory syncytial virus (RSV), adenovirus, metapneumovirus, and parainfluenza tests (public laboratory system only) by ISO week and month of testing, 31 December 2018 to 13 October 2019.

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Figure 6 Laboratory confirmed influenza admissions to Queensland public hospitals (n=3012) by ISO week, month and type of admission, and weekly percentage of laboratory confirmed influenza cases admitted to Queensland public hospitals, 31 December 2018 to 13 October 2019.

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Figure 7 Laboratory confirmed influenza admissions of Queensland residents to Queensland public hospitals (n=2922) by ISO week, month and influenza type/subtype, 31 December 2018 to 13 October 2019.

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Figure 8 Laboratory confirmed influenza admissions to Queensland public hospitals, by age group, sex, and age group specific admissions per 1,000 notifications, 31 December 2018 to 13 October 2019.

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Table 1 Influenza notifications by ISO week of onset, region* and Hospital & Health Service, 31 December 2018 to 13 October 2019.Hospital and

Region Health Service Total 5 year mean Ratio 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25Tropical Torres and Cape 595 147.2 4.0 3 9 15 35 21 13 3 3 3 7 17 24 30 46 32 37 48 62 37 23 9 3 6 4 4

Cairns and Hinterland 2,678 1,002.2 2.7 34 52 54 25 52 54 62 71 74 66 69 107 195 224 193 77 64 57 39 33 32 43 49 57 48North West 444 141.2 3.1 1 13 6 0 1 6 12 24 22 16 8 4 3 1 6 0 0 0 4 14 10 4 1 6 2Townsville 3,521 1,336.6 2.6 16 26 19 14 14 21 27 39 34 43 54 96 128 159 125 56 45 37 47 92 80 110 91 97 109Mackay 1,928 498.2 3.9 17 26 21 12 15 19 38 26 19 28 27 38 41 37 28 40 23 15 17 38 30 44 27 32 20

Central Central Queensland 3,889 1,072.0 3.6 7 10 11 6 12 15 9 2 12 8 6 12 12 17 22 15 20 21 38 46 47 40 38 58 43Central West 188 72.6 2.6 1 2 0 2 1 0 0 0 0 1 0 3 3 8 4 4 0 3 0 1 0 0 0 0 0Wide Bay 2,171 715.6 3.0 36 26 15 7 7 9 11 7 10 9 9 11 10 17 10 15 12 9 10 21 25 20 68 95 94Sunshine Coast 5,301 1,999.8 2.7 59 35 36 26 38 35 29 29 30 29 41 34 41 31 43 31 28 37 43 61 81 96 118 200 154Metro North 13,980 5,999.8 2.3 100 112 116 96 112 109 140 106 79 97 117 114 125 109 91 76 81 89 90 161 214 252 408 600 597

Southern Metro South 15,037 6,327.4 2.4 71 129 82 78 107 107 114 82 104 93 115 109 118 106 113 71 99 98 98 132 176 205 356 474 546Darling Downs 3,876 2,019.8 1.9 10 8 11 9 14 12 22 14 18 23 18 16 18 24 73 47 23 32 34 52 58 59 73 110 101West Moreton 4,996 1,468.2 3.4 21 18 21 11 13 16 13 14 18 19 37 43 42 17 23 22 25 21 16 30 44 55 109 217 208South West 452 175.6 2.6 2 2 1 1 1 2 0 0 9 2 2 2 3 16 14 2 0 3 3 7 3 13 6 5 3Gold Coast 7,079 2,839.2 2.5 62 66 52 53 50 73 73 53 38 39 44 40 47 53 49 45 47 42 40 60 77 61 79 158 179

Queensland 66,135 25,815.4 2.6 440 534 460 375 458 491 553 470 470 480 564 653 816 865 826 538 515 526 516 771 886 1,005 1,429 2,113 2,108

ISO Year To Date (2019) Week of Onset

Hospital and Week of OnsetRegion Health Service 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41Tropical Torres and Cape 3 2 0 5 7 5 11 11 7 6 8 10 11 8 4 3

Cairns and Hinterland 36 36 43 53 67 77 86 92 84 51 57 53 39 38 21 14North West 5 7 3 2 7 5 37 54 31 47 36 26 11 7 1 1Townsville 146 106 114 117 165 170 175 170 134 120 133 123 113 86 50 20Mackay 33 36 42 30 56 58 95 108 135 143 105 124 111 95 52 27

Central Central Queensland 60 84 72 90 247 312 350 347 432 340 246 264 263 154 74 27Central West 1 3 7 8 12 16 4 13 16 26 11 26 5 3 3 1Wide Bay 145 108 95 95 133 121 147 107 125 121 107 103 70 86 35 10Sunshine Coast 183 269 216 211 336 356 396 368 392 399 277 194 150 87 61 21Metro North 721 686 574 631 901 907 820 873 824 740 573 505 472 309 159 94

Southern Metro South 725 834 657 716 921 1,034 946 989 1,013 1,006 719 620 531 334 131 78Darling Downs 145 149 103 148 256 244 291 285 310 337 239 178 163 98 35 16West Moreton 228 234 211 237 334 354 441 385 355 321 294 201 168 88 46 26South West 8 23 6 9 12 23 24 21 58 41 43 37 24 11 6 4Gold Coast 192 202 221 298 488 590 605 669 571 517 357 273 228 153 88 47

Queensland 2,631 2,779 2,364 2,650 3,942 4,272 4,428 4,492 4,487 4,215 3,205 2,737 2,359 1,557 766 389*Regions defined here are aggregates of HHS used for surveillance purposes only and are not official geographical areas.

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Table 2

2019 total As a percentage of notifications (%) 5 year mean Ratio

Tropical Torres and Cape 595 47 7.9 29.4 1.6

Cairns and Hinterland 2,678 164 6.1 144.4 1.1North West 444 52 11.7 27.8 1.9Townsville 3,521 316 9.0 171.4 1.8Mackay 1,928 193 10.0 66.6 2.9

Central Central Queensland 3,889 181 4.7 81.0 2.2Central West 188 21 11.2 13.4 1.6Wide Bay 2,171 164 7.6 116.0 1.4Sunshine Coast 5,301 114 2.2 131.8 0.9Metro North 13,980 466 3.3 612.6 0.8

Southern Metro South 15,037 690 4.6 587.2 1.2Darling Downs 3,876 74 1.9 130.8 0.6West Moreton 4,996 156 3.1 162.8 1.0South West 452 16 3.5 18.4 0.9Gold Coast 7,079 296 4.2 326.8 0.9

Queensland 66,135 2,950 4.5 2,620.8 1.1

* Includes 147 overseas visitors notified in Queensland ^ Includes 28 overseas visitors admitted to Queensland public hospitals. A further 62 interstate residents were admitted to Queensland public hospitals

Laboratory confirmed influenza notifications and admissions to Queensland public hospitals, by region and Hospital & Health Service of residence, 31 December 2018 to 13 October 2019.

and are not included in the above table. Influenza notifications in Australian residents are reported to the National Notifiable Diseases Surveillance System by the health department in the state or territory of usual residence.

Hospital admissions^ year to dateYear to date

notifications*Hospital and Health ServiceRegion

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Figure 9 Annual* age-specific influenza notification rates in Queensland, 1 January 2014 to 13 October 2019.

*Annualised rate for 2019 (ISO week year to date)

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Appendix 1: Hospital and Health Services (2018 edition) with regions

Tropical Central SouthernTorres and Cape Central Queensland Metro SouthCairns and Hinterland Central West Darling DownsNorth West Wide Bay West MoretonTownsville Sunshine Coast South WestMackay Metro North Gold Coast

Regions and Hospital and Health Services