Influenza surveillance in Alberta
Evidence of influenza in Alberta 20112012
Weekly influenza report 
Summary: Week 16, April 1621, 2012
During Week 16, influenza activity remained elevated in Alberta, but appears to be decreasing. There was a decrease in the number of confirmed cases, an increase in influenza-like illness (ILI) in the community, a decrease in the number of new hospitalized cases, and an increase in the number of confirmed influenza outbreaks. The peak in influenza activity was later in the season than usual, and although decreasing, we can expect to continue to see some influenza activity over the next few weeks.
| North |
Sporadic activity. 10 confirmed influenza A (H3) cases 1 infant, 2 children, 2 adults, and 5 seniors. 3 confirmed influenza A (H1N1) cases 1 infant and 2 adults. 1 confirmed influenza A (untyped) infant case. 3 confirmed influenza B cases 2 infants and 1 child.
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| Edmonton |
Localized activity. 23 confirmed influenza A (H3) cases 3 infants, 1 child, 6 adults, and 13 seniors. 2 confirmed influenza A (H1N1) cases 1 infant and 1 senior. 2 confirmed influenza A (untyped) cases 1 adult and 1 senior. 4 confirmed influenza B child cases. 3 confirmed influenza A (H3) outbreaks in two long-term care facilities and one supportive living site.
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| Central |
Sporadic activity. 4 confirmed influenza A (H3) cases 1 child, 2 adults, and 1 senior. 1 confirmed influenza A (H1N1) child case. 11 confirmed influenza B cases 2 infants, 8 children and 1 adult.
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| Calgary |
Localized activity. 14 confirmed influenza A (H3) cases 2 children, 5 adults, and 7 seniors. 3 confirmed influenza A (H1N1) cases 1 infant and 2 adults. 4 confirmed influenza B cases 2 infants and 2 adults. 1 confirmed influenza A (H3) outbreak in a long-term care facility.
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| South |
Localized activity. 8 confirmed influenza A (H3) cases 2 children and 6 adults. 3 confirmed influenza A (H1N1) cases 2 adults and 1 senior. 2 confirmed influenza B cases 1 adult and 1 senior. 2 confirmed influenza A (H3) outbreaks in a supportive living site and a child care facility.
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Activity level definitions
- No activity No laboratory-confirmed influenza detections in the reporting week. However, sporadically occurring influenza-like illness (ILI) may be reported.
- Sporadic Sporadically occuring ILI and lab confirmed influenza detection(s) with no ILI/influenza outbreaks detected within the health zone.
- Localized Evidence of increased ILI and lab confirmed influenza detection(s) together with outbreaks in schools, hospitals, residential institutions and/or other types of facilities occurring in less than 50% of the health zone.
- Widespread Evidence of increased ILI and lab confirmed influenza detection(s) together with outbreaks in schools, hospitals, residential institutions and/or other types of facilities occurring in greater than or equal to 50% of the health zone.
Report archive
20112012 reports
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