Source: http://www.phac-aspc.gc.ca/fluwatch/.../index-eng.php
Overall Influenza Summary - Week 42 (October 18 to October 24, 2009)
Striking increases in overall influenza activity were reported this week. All indicators (proportion of positive influenza tests, national ILI consultation rate, number of regions reporting widespread activity and number of influenza outbreaks) were considerably higher this week compared to the previous weeks.
Ten regions reported widespread activity in BC, SK, NL & NT and fourteen regions in BC, AB, SK, ON, QC, NB & NS reported localized activity, while twenty-three regions reported sporadic activity in MB, ON, QC, NB, PEI, NS, NL, YK & NU and seven regions in NB, NS & NL reported no activity. The 226 influenza outbreaks reported this week were all in schools except 6 in hospitals (ON, NL), 3 in long-term care facility (BC, QC) and 3 in an unspecified location (AB, ON). The schools outbreaks were in BC (100), AB (87), NT (16), SK (4), NS (4), NL (2) and NB (1). Note that this is the first year that all the provinces and territories are reporting on influenza outbreaks in schools (greater than 10% absenteeism on any day most likely due to ILI) which is increasing considerably the total number of outbreaks reported compared to the previous years.
Map of overall Influenza activity level
by provinces and territories, Week 42, Canada
<TABLE class=widthFull cellSpacing=0 cellPadding=0><TBODY><TR><TD class=alignCenter></TD><TD><TABLE cellSpacing=0 cellPadding=1 border=0><TBODY><TR><TD align=middle><TABLE class=border-lite cellSpacing=1 cellPadding=1><TBODY><TR align=middle><TD>No Data </TD><TD></TD></TR><TR align=middle><TD>No Activity</TD><TD></TD></TR><TR align=middle><TD>Sporadic Activity</TD><TD></TD></TR><TR align=middle><TD>Localized Activity</TD><TD></TD></TR><TR align=middle><TD>Widespread
Activity
</TD><TD></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
Note: Influenza activity levels, as represented on this map, are assigned and reported by Provincial and Territorial Ministries of Health, based on laboratory confirmations, sentinel ILI rates (see graphs and tables) and reported outbreaks. Please refer to detailed definitions on the last page. For areas where no data is reported, late reports from these provinces and territories will appear on the FluWatch website.
Overall Number of Influenza Outbreaks, Canada, by Report Week, 2009-2010
Influenza-like illness (ILI) consultation rates, Canada, by report week,
2009-2010 compared to 1996/97 through to 2007/08 seasons
Note: No data available for mean rate in previous years for weeks 19 to 39 (1996-1997 through 2002-2003 seasons).
*Delays in the reporting of data may cause data to change restrospectively.
Laboratory Surveillance Summary
This week, the proportion of tests that were positive for influenza was 29.0% which is a significant increase compared to the previous weeks (see Tests table). All provinces and territories had a high proportion of positive tests for influenza this week, especially British Columbia with more than 52% of positive tests for influenza. This week, a total of 3,962 specimens tested positive for influenza this week (all A) and 99.7% of the positive influenza A subtyped specimens were Pandemic (H1N1) 2009.
Influenza tests reported and percentage of tests positive, Canada,
by report week, 2009-2010
Percent positive influenza tests, compared to other respiratory viruses, Canada,
by reporting week, 2009-2010
Weekly & Cumulative numbers of positive influenza specimens, by Provincial Laboratories
<TABLE class=widthFull cellSpacing=0 cellPadding=2 border=1><TFOOT><TR><TD class=fontSize85 id=gr12 headers=gr1 colSpan=13>Specimens from NT, YT, and NU are sent to reference laboratories in other provinces.
Note: Cumulative data includes updates to previous weeks; due to reporting delays, the sum of weekly report totals do not add up to cumulative totals.
* Not subtyped
</TD></TR></TFOOT><TBODY><TR><TH class=bg-colour-blue scope=col rowSpan=3>Reporting provinces</TH><TH class="fontSize85 bg-colour-blue" scope=colgroup colSpan=6>Weekly (Oct. 18-24, 2009)</TH><TH class="fontSize85 bg-colour-blue" scope=colgroup colSpan=6>Cumulative (Aug. 30-Oct. 24, 2009)</TH></TR><TR><TH class="fontSize85 bg-colour-blue" scope=colgroup colSpan=5>Influenza A</TH><TH class="fontSize85 bg-colour-blue" scope=col>B</TH><TH class="fontSize85 bg-colour-blue" scope=colgroup colSpan=5>Influenza A</TH><TH class="fontSize85 bg-colour-blue" scope=col>B</TH></TR><TR><TH class="fontSize85 bg-colour-blue" scope=col>A Total</TH><TH class="fontSize85 bg-colour-blue" scope=col>A(H1)</TH><TH class="fontSize85 bg-colour-blue" scope=col>A(H3)</TH><TH class="fontSize85 bg-colour-blue" scope=col>Pand (H1N1)</TH><TH class="fontSize85 bg-colour-blue" scope=col>A (NS)*</TH><TH class="bg-colour-blue fontSize85" scope=col>Total</TH><TH class="fontSize85 bg-colour-blue" scope=col>A Total</TH><TH class="fontSize85 bg-colour-blue" scope=col>A(H1)</TH><TH class="fontSize85 bg-colour-blue" scope=col>A(H3)</TH><TH class="fontSize85 bg-colour-blue" scope=col>Pand (H1N1)</TH><TH class="fontSize85 bg-colour-blue" scope=col>A (NS)*</TH><TH class="fontSize85 bg-colour-blue" scope=col>Total</TH></TR><TR><TH class=bg-colour-blue scope=row>BC</TH><TD class=alignCenter>1176</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>1170</TD><TD class=alignCenter>6</TD><TD class=alignCenter>0</TD><TD class=alignCenter>2648</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>2091</TD><TD class=alignCenter>557</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>AB</TH><TD class=alignCenter>1212</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>538</TD><TD class=alignCenter>674</TD><TD class=alignCenter>0</TD><TD class=alignCenter>1847</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>769</TD><TD class=alignCenter>1078</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>SK</TH><TD class=alignCenter>127</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>92</TD><TD class=alignCenter>35</TD><TD class=alignCenter>0</TD><TD class=alignCenter>213</TD><TD class=alignCenter>0</TD><TD class=alignCenter>1</TD><TD class=alignCenter>162</TD><TD class=alignCenter>50</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>MB</TH><TD class=alignCenter>21</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>19</TD><TD class=alignCenter>2</TD><TD class=alignCenter>0</TD><TD class=alignCenter>40</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>34</TD><TD class=alignCenter>6</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>ON</TH><TD class=alignCenter>818</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>467</TD><TD class=alignCenter>351</TD><TD class=alignCenter>0</TD><TD class=alignCenter>1280</TD><TD class=alignCenter>1</TD><TD class=alignCenter>0</TD><TD class=alignCenter>724</TD><TD class=alignCenter>555</TD><TD class=alignCenter>2</TD></TR><TR><TH class=bg-colour-blue scope=row>QC</TH><TD class=alignCenter>457</TD><TD class=alignCenter>0</TD><TD class=alignCenter>8</TD><TD class=alignCenter>449</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>676</TD><TD class=alignCenter>34</TD><TD class=alignCenter>9</TD><TD class=alignCenter>566</TD><TD class=alignCenter>67</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>NB</TH><TD class=alignCenter>8</TD><TD class=alignCenter>1</TD><TD class=alignCenter>0</TD><TD class=alignCenter>7</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>13</TD><TD class=alignCenter>1</TD><TD class=alignCenter>1</TD><TD class=alignCenter>9</TD><TD class=alignCenter>2</TD><TD class=alignCenter>1</TD></TR><TR><TH class=bg-colour-blue scope=row>NS</TH><TD class=alignCenter>67</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>63</TD><TD class=alignCenter>4</TD><TD class=alignCenter>0</TD><TD class=alignCenter>87</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>77</TD><TD class=alignCenter>10</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>PE</TH><TD class=alignCenter>7</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>6</TD><TD class=alignCenter>1</TD><TD class=alignCenter>0</TD><TD class=alignCenter>12</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>11</TD><TD class=alignCenter>1</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>NL</TH><TD class=alignCenter>69</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>69</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>77</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>77</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>Canada</TH><TD class=alignCenter>3962</TD><TD class=alignCenter>1</TD><TD class=alignCenter>8</TD><TD class=alignCenter>2880</TD><TD class=alignCenter>1073</TD><TD class=alignCenter>0</TD><TD class=alignCenter>6893</TD><TD class=alignCenter>36</TD><TD class=alignCenter>11</TD><TD class=alignCenter>4520</TD><TD class=alignCenter>2326</TD><TD class=alignCenter>3</TD></TR></TBODY></TABLE>
Overall Influenza Summary - Week 42 (October 18 to October 24, 2009)
Striking increases in overall influenza activity were reported this week. All indicators (proportion of positive influenza tests, national ILI consultation rate, number of regions reporting widespread activity and number of influenza outbreaks) were considerably higher this week compared to the previous weeks.
Ten regions reported widespread activity in BC, SK, NL & NT and fourteen regions in BC, AB, SK, ON, QC, NB & NS reported localized activity, while twenty-three regions reported sporadic activity in MB, ON, QC, NB, PEI, NS, NL, YK & NU and seven regions in NB, NS & NL reported no activity. The 226 influenza outbreaks reported this week were all in schools except 6 in hospitals (ON, NL), 3 in long-term care facility (BC, QC) and 3 in an unspecified location (AB, ON). The schools outbreaks were in BC (100), AB (87), NT (16), SK (4), NS (4), NL (2) and NB (1). Note that this is the first year that all the provinces and territories are reporting on influenza outbreaks in schools (greater than 10% absenteeism on any day most likely due to ILI) which is increasing considerably the total number of outbreaks reported compared to the previous years.
Map of overall Influenza activity level
by provinces and territories, Week 42, Canada
<TABLE class=widthFull cellSpacing=0 cellPadding=0><TBODY><TR><TD class=alignCenter></TD><TD><TABLE cellSpacing=0 cellPadding=1 border=0><TBODY><TR><TD align=middle><TABLE class=border-lite cellSpacing=1 cellPadding=1><TBODY><TR align=middle><TD>No Data </TD><TD></TD></TR><TR align=middle><TD>No Activity</TD><TD></TD></TR><TR align=middle><TD>Sporadic Activity</TD><TD></TD></TR><TR align=middle><TD>Localized Activity</TD><TD></TD></TR><TR align=middle><TD>Widespread
Activity
</TD><TD></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
Note: Influenza activity levels, as represented on this map, are assigned and reported by Provincial and Territorial Ministries of Health, based on laboratory confirmations, sentinel ILI rates (see graphs and tables) and reported outbreaks. Please refer to detailed definitions on the last page. For areas where no data is reported, late reports from these provinces and territories will appear on the FluWatch website.
Overall Number of Influenza Outbreaks, Canada, by Report Week, 2009-2010
Influenza-like illness (ILI) consultation rates, Canada, by report week,
2009-2010 compared to 1996/97 through to 2007/08 seasons
Note: No data available for mean rate in previous years for weeks 19 to 39 (1996-1997 through 2002-2003 seasons).
*Delays in the reporting of data may cause data to change restrospectively.
Laboratory Surveillance Summary
This week, the proportion of tests that were positive for influenza was 29.0% which is a significant increase compared to the previous weeks (see Tests table). All provinces and territories had a high proportion of positive tests for influenza this week, especially British Columbia with more than 52% of positive tests for influenza. This week, a total of 3,962 specimens tested positive for influenza this week (all A) and 99.7% of the positive influenza A subtyped specimens were Pandemic (H1N1) 2009.
Influenza tests reported and percentage of tests positive, Canada,
by report week, 2009-2010
Percent positive influenza tests, compared to other respiratory viruses, Canada,
by reporting week, 2009-2010
Weekly & Cumulative numbers of positive influenza specimens, by Provincial Laboratories
<TABLE class=widthFull cellSpacing=0 cellPadding=2 border=1><TFOOT><TR><TD class=fontSize85 id=gr12 headers=gr1 colSpan=13>Specimens from NT, YT, and NU are sent to reference laboratories in other provinces.
Note: Cumulative data includes updates to previous weeks; due to reporting delays, the sum of weekly report totals do not add up to cumulative totals.
* Not subtyped
</TD></TR></TFOOT><TBODY><TR><TH class=bg-colour-blue scope=col rowSpan=3>Reporting provinces</TH><TH class="fontSize85 bg-colour-blue" scope=colgroup colSpan=6>Weekly (Oct. 18-24, 2009)</TH><TH class="fontSize85 bg-colour-blue" scope=colgroup colSpan=6>Cumulative (Aug. 30-Oct. 24, 2009)</TH></TR><TR><TH class="fontSize85 bg-colour-blue" scope=colgroup colSpan=5>Influenza A</TH><TH class="fontSize85 bg-colour-blue" scope=col>B</TH><TH class="fontSize85 bg-colour-blue" scope=colgroup colSpan=5>Influenza A</TH><TH class="fontSize85 bg-colour-blue" scope=col>B</TH></TR><TR><TH class="fontSize85 bg-colour-blue" scope=col>A Total</TH><TH class="fontSize85 bg-colour-blue" scope=col>A(H1)</TH><TH class="fontSize85 bg-colour-blue" scope=col>A(H3)</TH><TH class="fontSize85 bg-colour-blue" scope=col>Pand (H1N1)</TH><TH class="fontSize85 bg-colour-blue" scope=col>A (NS)*</TH><TH class="bg-colour-blue fontSize85" scope=col>Total</TH><TH class="fontSize85 bg-colour-blue" scope=col>A Total</TH><TH class="fontSize85 bg-colour-blue" scope=col>A(H1)</TH><TH class="fontSize85 bg-colour-blue" scope=col>A(H3)</TH><TH class="fontSize85 bg-colour-blue" scope=col>Pand (H1N1)</TH><TH class="fontSize85 bg-colour-blue" scope=col>A (NS)*</TH><TH class="fontSize85 bg-colour-blue" scope=col>Total</TH></TR><TR><TH class=bg-colour-blue scope=row>BC</TH><TD class=alignCenter>1176</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>1170</TD><TD class=alignCenter>6</TD><TD class=alignCenter>0</TD><TD class=alignCenter>2648</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>2091</TD><TD class=alignCenter>557</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>AB</TH><TD class=alignCenter>1212</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>538</TD><TD class=alignCenter>674</TD><TD class=alignCenter>0</TD><TD class=alignCenter>1847</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>769</TD><TD class=alignCenter>1078</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>SK</TH><TD class=alignCenter>127</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>92</TD><TD class=alignCenter>35</TD><TD class=alignCenter>0</TD><TD class=alignCenter>213</TD><TD class=alignCenter>0</TD><TD class=alignCenter>1</TD><TD class=alignCenter>162</TD><TD class=alignCenter>50</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>MB</TH><TD class=alignCenter>21</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>19</TD><TD class=alignCenter>2</TD><TD class=alignCenter>0</TD><TD class=alignCenter>40</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>34</TD><TD class=alignCenter>6</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>ON</TH><TD class=alignCenter>818</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>467</TD><TD class=alignCenter>351</TD><TD class=alignCenter>0</TD><TD class=alignCenter>1280</TD><TD class=alignCenter>1</TD><TD class=alignCenter>0</TD><TD class=alignCenter>724</TD><TD class=alignCenter>555</TD><TD class=alignCenter>2</TD></TR><TR><TH class=bg-colour-blue scope=row>QC</TH><TD class=alignCenter>457</TD><TD class=alignCenter>0</TD><TD class=alignCenter>8</TD><TD class=alignCenter>449</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>676</TD><TD class=alignCenter>34</TD><TD class=alignCenter>9</TD><TD class=alignCenter>566</TD><TD class=alignCenter>67</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>NB</TH><TD class=alignCenter>8</TD><TD class=alignCenter>1</TD><TD class=alignCenter>0</TD><TD class=alignCenter>7</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>13</TD><TD class=alignCenter>1</TD><TD class=alignCenter>1</TD><TD class=alignCenter>9</TD><TD class=alignCenter>2</TD><TD class=alignCenter>1</TD></TR><TR><TH class=bg-colour-blue scope=row>NS</TH><TD class=alignCenter>67</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>63</TD><TD class=alignCenter>4</TD><TD class=alignCenter>0</TD><TD class=alignCenter>87</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>77</TD><TD class=alignCenter>10</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>PE</TH><TD class=alignCenter>7</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>6</TD><TD class=alignCenter>1</TD><TD class=alignCenter>0</TD><TD class=alignCenter>12</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>11</TD><TD class=alignCenter>1</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>NL</TH><TD class=alignCenter>69</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>69</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>77</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD><TD class=alignCenter>77</TD><TD class=alignCenter>0</TD><TD class=alignCenter>0</TD></TR><TR><TH class=bg-colour-blue scope=row>Canada</TH><TD class=alignCenter>3962</TD><TD class=alignCenter>1</TD><TD class=alignCenter>8</TD><TD class=alignCenter>2880</TD><TD class=alignCenter>1073</TD><TD class=alignCenter>0</TD><TD class=alignCenter>6893</TD><TD class=alignCenter>36</TD><TD class=alignCenter>11</TD><TD class=alignCenter>4520</TD><TD class=alignCenter>2326</TD><TD class=alignCenter>3</TD></TR></TBODY></TABLE>
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