PEI Weekly Influenza Summary 2022-2023 Season

Week 16 - April 16 to April 22, 2023

 

COVID-19 Weekly Testing and Case Data

 

Summary

  • There was no activity in PEI during Week 16.
  • Our seasonal total is 358 lab-confirmed cases (111 A/H3, 1 A/H1N1, 242 A/unsubtyped, and 4 B).
  • The median age of cases to date is 23 years; 57% of cases are female.
  • Nationally in Weeks 14 - 15 (April 2 - April 15), influenza activity has increased slightly, but remains at levels usually seen in late spring/early summer with the increase being due to influenza B.
  • This will be the last PEI Influenza Summary for the 2022-23 season.

 

Epidemiological curve of laboratory data

There was no activity in PEI during Week 16. Lab-confirmed influenza tests are just an indication of greater influenza activity, as many individuals with influenza do not seek medical attention.

This chart shows the weekly counts of lab-confirmed influenza during the 2022-23 Influenza Season

 

Positive influenza test results, current week, and cumulative 2022-23 season

Lab-confirmed cases Current Week (16) Cumulative 2022-2023
Influenza A              0               355
                A/H3              0               111
                A/H1N1              0                 1
                A/Unsubtyped              0               242
Influenza B              0                 4
Total Influenza              0               359

Respiratory outbreaks, current week, and cumulative 2022-23 season

Respiratory Outbreaks

Current Week (16

Cumulative 2022-2023
Influenza A                 0                   7
Influenza B                 0                   0
Influenza, Unknown Type                 0                   0
ILI1                 0                  21
Total Outbreaks                 0                  28

 

1 ILI: Influenza like illness; does not include COVID-19

Severe outcome surveillance, current week, and cumulative 2022-23 season

Severe Outcome Current Week (16) Cumulative 2022-2023
Hospitalizations1                 0                    80
ICU                 0                     6
Deaths2                 0                     5

1 Hospitalization data is gathered through infection prevention and control practitioners at each Island hospital.  Data includes ICU cases.

2 Deaths include individuals with a positive influenza test result.  Influenza may not have been the major contributing cause of death.

 

Definitions (based on national Fluwatch definitions)

Activity levels:  
  1. No activity:  no lab-confirmed influenza detections in the reporting week, however, sporadically occurring ILI may be reported
  2. Sporadic:  sporadically occurring ILI and lab-confirmed influenza detection(s) with no outbreaks detected within the influenza surveillance region
  3. Localized:  evidence of increased ILI; lab-confirmed influenza detection(s); outbreaks in 1 county only
  4. Widespread:  evidence of increased ILI; lab-confirmed influenza detection(s); outbreaks in more than 1 county

Outbreaks:

  1. Hospitals and Residential institutions:  2 or more cases of ILI occurring within a 7 day period, with at least 1 lab- confirmed case
  2. Schools, Workplaces and other:  absenteeism greater than 10% higher than expected which is most likely due to ILI

 

Links

Fluwatch - Public Health Agency of Canada

PEI Annual Influenza Summaries

 

 

Published date: 
March 21, 2023