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Influenza in Alberta 2013-2104 Season. Kim Simmonds, Manager Infectious Disease Epidemiology Alberta Health . 2012-2013 Year in Review. - PowerPoint PPT Presentation
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Influenza in Alberta
2013-2104 Season
Kim Simmonds, Manager Infectious Disease Epidemiology
Alberta Health
1
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
H1N1 2013-2014 SeasonA timelineDecember 20:
o Alberta Health is notified of the cases of severe influenza on ECMO (extracorporeal membrane oxygenation).
o Cases of H1N1 are rapidly increasingDecember 23:
o Mini-EOC opened at Alberta HealthDecember 24:
o Media reports the increase in number of H1N1 casesDecember 27:
o Mass immunizations clinics opened January 10:
o Mini-EOC closed at Alberta HealthJanuary 11:
o Alberta Health Services announces vaccine is no longer available
3
A Twitter over vaccine & flu
4
5
Canada December 29 to January 4, 2014 (Week 1)
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No Activity
Sporadic Activity
Localized Activity
Widespread Activity
Immunizations
7
Immunizations
8
2011-12 2012-13 2013-140
100,000
200,000
300,000
400,000
500,000
600,000Influenza Immunizations by Provider, by Season
AHS Pharmacy Physicians
Indi
vidu
als I
mm
unize
d
Influenza Activity
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TARRANT Reporting
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Influenza Cases-Lab Confirmed
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Influenza by Zone • Rates are highest in
North and Central Zones.
• Rates of hospitalization are highest in the North, Edmonton & Central Zones
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Hospitalized Cases
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Hospitalized Cases by Zone
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Zone H5N1 Influenza A H1N1
Influenza A H3
Influenza A
Untyped
Influenza B Total
South Zone 0 49 0 2 0 51Calgary Zone 0 276 6 20 11 313Central Zone 1 103 1 19 4 128Edmonton Zone 0 282 10 52 10 354
Northern Zone 0 118 0 12 0 130
Total 1 828 17 105 25 976
Zone by Influenza Strain
Hospital, ICU & Deathsfor H1N1 & untyped Cases
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Hospitalizations ICU Deaths(n=933) (n=158) (n=33)
Age (median, range) 53 (0-93) 51 (0-83) 55 (17-91)
Gender (males, females) 468 M, 465 F 83 M,75 F 14 M, 19 F
No co-morbidities 29%(266/933) 13%(20/158) 15% (5/33)One comorbidity 30%(285/933) 34% (54/158) 18% (6/33)
Two or more comorbidities 41% (382/933) 53% (84/158) 67% (22/33)
Immunized-current year 15% (140/933) 12% (19/158) 9% (3/33)Immunized-previous
year 20% (183/933) 14% (22/158) 15% (5/33)
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.
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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
Questions?Kimberley.simmonds@gov.ab.ca
780.422.1940
18
Thank you to Larry Svenson & Allison Scott
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