1. Influenza in Alberta 2013-2104 Season Kim Simmonds, Manager Infectious Disease Epidemiology Alberta Health 1

2. 2012-2013 Year in Review The 2012/2013 influenza season in North America began earlier, peaked earlier, and was longer than other seasons since 2003, with the exception of the 2009 season. The predominant strain was H3N2, with a late wave of Influenza B Highest rate of cases elderly (80+), infants <1, and children 1 to 4. Influenza Cases: –28,933 Albertans were diagnosed with ILI –2,871 laboratory confirmed –964 hospitalized –150 ICU –37 deaths 2

3. H1N1 2013-2014 Season A timeline December 20: o Alberta Health is notified of the cases of severe influenza on ECMO (extracorporeal membrane oxygenation). o Cases of H1N1 are rapidly increasing December 23: o Mini-EOC opened at Alberta Health December 24: o Media reports the increase in number of H1N1 cases December 27: o Mass immunizations clinics opened January 10: o Mini-EOC closed at Alberta Health January 11: o Alberta Health Services announces vaccine is no longer available 3

4. A Twitter over vaccine & flu 4

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6. Canada December 29 to January 4, 2014 (Week 1) 6 No Activity Sporadic Activity Localized Activity Widespread Activity

7. Immunizations 7

8. 8

9. Influenza Activity 9

10. TARRANT Reporting 10

11. Influenza Cases-Lab Confirmed 11

12. Influenza by Zone Rates are highest in North and Central Zones. Rates of hospitalization are highest in the North, Edmonton & Central Zones 12

13. Hospitalized Cases 13

14. Hospitalized Cases by Zone 14

15. Hospital, ICU & Deaths for H1N1 & untyped Cases 15

16. Outbreaks There were fewer institutional outbreaks this year compared to last year. –31 outbreaks in 2013/14 –83 outbreaks in 2012/13 More school and daycare outbreaks were seen this year compared to previous years. 16

17. 2013-2014 Summary (so far) The 2013/2043 influenza season had a sudden rise and fall in the rate of disease. The predominant strain was H1N1 Highest rate of cases infants <1, and children 1 to 4. Adults had a higher rate of disease than previous years Influenza Cases: –23,173 Albertans were diagnosed with ILI –3,208 laboratory confirmed –933 hospitalized –158 ICU –33 deaths 17

18. Questions? Kimberley.simmonds@gov.ab.ca 780.422.1940 Kimberley.simmonds@gov.ab.ca 18 Thank you to Larry Svenson & Allison Scott