Ontario Influenza Bulletin 2010-2011 - Surveillance Weeks 18-19 - 2265 hospitalizations and 194 deaths (total)

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Ontario Influenza Bulletin

2010-2011 Season

SURVEILLANCE WEEKS 51 & 52 (December 19, 2010? January 1, 2011)

Excerpt:

Ontario health units reported 642 new confirmed cases of influenza A for the current week through the integrated Public Health Information System (iPHIS). A total of 281 institutional respiratory infection outbreaks have been reported in 2010 up to Weeks 51 & 52, including 33 new influenza A outbreaks from Toronto (18), Central West (8), South West (4), Eastern (1) and Central East (2) health regions. For week 52, Toronto reported widespread influenza activity; Central East, Central West, Eastern and South West health regions reported ?localized? level influenza activity; and the remaining health regions reported either sporadic, no influenza activity or did not report for week 52. The ILI rate is higher than the average rate for week 52 from previous years.

Full text:
http://www.health.gov.on.ca/en/pro/p...l_20100107.pdf

Previous bulletins:
http://www.health.gov.on.ca/en/pro/p...0/default.aspx

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Re: Ontario Influenza Bulletin 2010-2011 - Surveillance week 1

SURVEILLANCE WEEK 1 (January 2, 2011? January 8, 2011)

Excerpt:

Ontario Influenza Bulletin, 2010-2011
Surveillance Week 1 (January 2, 2011 ? January 8, 2011)
Produced by: Surveillance Section, Public Health Protection and Prevention Branch

Overall, influenza activity in Ontario during week 1, 2010, was slightly higher when compared to week 52, 2010.
Ontario health units reported 720 new confirmed cases of influenza A for the current week through the integrated
Public Health Information System (iPHIS). A total of 341 institutional respiratory infection outbreaks have been
reported in 2010 up to Week 1, including 19 new influenza A outbreaks from Toronto (8), Central West (6), South
West (1), and Central East (4) health regions. For week 1, Toronto reported widespread influenza activity; Central
East, Central West, Eastern and South West health regions reported ?localized? level influenza activity; and the
North West and North East health regions reported sporadic activity. The ILI rate is higher than the average rate for week 1 from previous years.

Full report:

http://www.health.gov.on.ca/en/pro/programs/publichealth/flu/bulletins/2011/docs/flu_bul_20110108.pdf

http://www.health.gov.on.ca/en/pro/p...0/default.aspx

[Ronan Kelly]

Re: Ontario Influenza Bulletin 2010-2011 - Surveillance week 1

From the link above,

"Hospitalizations and deaths among laboratory confirmed influenza cases, Sep. 1, 2010 ? Jan. 8, 2011
As of January 8, 2011, 302 hospitalizations and 22 deaths have been reported among lab confirmed influenza
cases reported in Ontario for the 2010-2011 season. Most of the hospitalizations and all of the deaths have
occurred in influenza A cases. The highest rates of hospitalization have been observed in people under the age
of five and 65 years of age and older."

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Ontario Influenza Bulletin 2010-2011 - Surveillance week 2: 23 deaths, total 45

SURVEILLANCE WEEK 2 (January 9, 2011? January 15, 2011)

Excerpt:

Twenty-three deaths were reported* from
January 9 to January 15, which is more than the
12 that were reported from January 2 to January 8.

Ontario Influenza Bulletin, 2010-2011
Surveillance Week 2 (January 9, 2011 ? January 15, 2011)
Produced by: Surveillance Section, Public Health Protection and Prevention Branch
- 2 -
Overall, influenza activity in Ontario during week 2, 2010, was lower when compared to week 1, 2010. Ontario
health units reported 667 new confirmed cases of influenza A for the current week through the integrated Public
Health Information System (iPHIS). A total of 384 institutional respiratory infection outbreaks have been reported
in the 2010/11 season up to Week 2, including 8 new influenza A outbreaks from Toronto (4), Central West (1),
South West (2), and Central East (1) health regions. For week 2, Toronto reported widespread influenza activity;
Central East, Central West, Eastern, South West and North East health regions reported ?localized? level influenza
activity; and the North West health region reported sporadic activity. The ILI rate is higher than the average rate for week 2 from previous years.

Table 4b.

Incidence of deaths among lab confirmed influenza cases in Ontario, Sep. 1, 2010 ? Jan. 15, 2011


Influenza A Influenza B Total Influenza

Age Group Number Rate/100,000 Number Rate/100,000 Number Rate/100,000
<1 0 0.00 0 0.00 0 0.00

1-4 1 0.18 0 0.00 1 0.18

5-14 0 0.00 0 0.00 0 0.00

15-24 0 0.00 0 0.00 0 0.00

25-44 2 0.05 0 0.00 2 0.05

45-64 9 0.25 0 0.00 9 0.25

65+ 33 1.82 0 0.00 33 1.82

TOTAL

45 0.34 0 0.00 45 0.34

Source (incidence):

Ontario Ministry of Health and Long-Term Care, integrated Public Health Information System (iPHIS) database, extracted at 8:30
am [20/01/2011]

Full report:
http://www.health.gov.on.ca/en/pro/programs/publichealth/flu/bulletins/2011/docs/flu_bul_20110115.pdf

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Re: Ontario Influenza Bulletin 2010-2011 - Surveillance week 3 - 62 deaths total

SURVEILLANCE WEEK 3 (January 16, 2011? January 22, 2011)

Overall, influenza activity in Ontario during week 3, 2010, was lower when compared to week 2, 2010. Ontario

health units reported 503 new confirmed cases of influenza A for the current week through the integrated Public
Health Information System (iPHIS). A total of 434 institutional respiratory infection outbreaks have been reported
in the 2010/11 season up to Week 3, including 8 new influenza A outbreaks from Central West (4), Toronto (2),
South West (1), and North East (1) health regions. For week 3, Toronto reported widespread influenza activity;
Central East, Central West, Eastern, South West and North East health regions reported ?localized? level influenza
activity; and the North West health region reported sporadic activity. This rate is higher than the average rate for week 3 from previous years.

...

Hospitalizations and deaths among laboratory confirmed influenza cases, Sep. 1, 2010 ? Jan. 22, 2011
As of January 22, 2011, 905 hospitalizations and 62 deaths have been reported among lab confirmed influenza
cases reported in Ontario for the 2010-2011 season. Most of the hospitalizations and deaths have occurred in
influenza A cases. The highest rates of hospitalization have been observed in people under the age of five and 65 years of age and older. The highest rates of death have been seen in people 65 years of age and older.

Full report:

http://www.health.gov.on.ca/en/pro/p...l_20110122.pdf

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Re: Ontario Influenza Bulletin 2010-2011 - Surveillance week 4 - 79 deaths total

Ontario Influenza Bulletin, 2010-2011
Surveillance Week 4 (January 23, 2011 ? January 29, 2011)
Produced by: Surveillance Section, Public Health Protection and Prevention Branch

Overall, influenza activity in Ontario during week 4, 2010, was lower when compared to week 3, 2010. Ontario
health units reported 434 new confirmed cases of influenza A for the current week through the integrated Public
Health Information System (iPHIS). A total of 461 institutional respiratory infection outbreaks have been reported
in the 2010/11 season up to Week 4, including 5 new influenza A outbreaks from Eastern (3), Central West (1),
and South West (1) health regions. For week 4, Toronto, Central East, Central West, Eastern, South West and
North East health regions reported ?localized? level influenza activity; and the North West health region reported

sporadic activity. The ILI rate is higher than the average rate for week 4 from previous years.

...

Hospitalizations and deaths among laboratory confirmed influenza cases, Sep. 1, 2010 ? Jan. 29, 2011

As of January 29, 2011, 1047 hospitalizations and 79 deaths have been reported among lab confirmed influenza cases reported in Ontario for the 2010-2011 season. Most of the hospitalizations and deaths have occurred in influenza A cases. The highest rates of hospitalization have been observed in people under the age of five and 65 years of age and older. The highest rates of death have been seen in people 65 years of age and older.

Full report:
http://www.health.gov.on.ca/en/pro/p...l_20110204.pdf

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Re: Ontario Influenza Bulletin 2010-2011 - Surveillance week 5 - 90 deaths total

Ontario Influenza Bulletin, 2010-2011
Surveillance Week 5 (January 30, 2011 ? February 5, 2011)

Excerpt:

Overall, influenza activity in Ontario during week 5, 2010, was lower when compared to week 4, 2010. Ontario
health units reported 424 new laboratory confirmed cases of influenza for the current week through the integrated
Public Health Information System (iPHIS). A total of 513 institutional respiratory infection outbreaks have been
reported in the 2010/11 season up to Week 5, including 12 new influenza outbreaks from Central East (4), Central
West (4), Toronto (2), Eastern (1), and South West (1) health regions. For week 5, Toronto, Central East, Central
West, Eastern, South West and North East health regions reported ?localized? level influenza activity; and the
North West health region reported sporadic activity. The ILI rate is higher than the average rate for week 5 from

previous years.

...

Hospitalizations and deaths among laboratory confirmed influenza cases, Sep. 1, 2010 ? Feb. 5, 2011

As of February 5, 2011, 1194 hospitalizations and 90 deaths have been reported among lab confirmed influenza
cases reported in Ontario for the 2010-2011 season. Most of the hospitalizations and deaths have occurred in
influenza A cases. The highest rates of hospitalization have been observed in people under the age of five and

65 years of age and older. The highest rates of death have been seen in people 65 years of age and older.

Full report:

http://www.health.gov.on.ca/en/pro/programs/publichealth/flu/bulletins/2010/docs/flu_bul_20110211.pdf

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Re: Ontario Influenza Bulletin 2010-2011 - Surveillance week 6 - 117 deaths total

SURVEILLANCE WEEK 6 (February 6, 2011? February 12, 2011)

Ontario Influenza Bulletin, 2010-2011
Surveillance Week 6 (February 6, 2011 ? February 12, 2011)
Produced by: Surveillance Section, Public Health Protection and Prevention Branch
-
Overall, influenza activity in Ontario during week 6, 2010, was lower when compared to week 5, 2010. Ontario
health units reported 408 new laboratory confirmed cases of influenza for the current week through the integrated
Public Health Information System (iPHIS). A total of 552 institutional respiratory infection outbreaks have been
reported in the 2010/11 season up to Week 6, including 11 new influenza outbreaks from Eastern (3), South West
(3), Central East (2), Central West (2), and North East (1) health regions. For week 6, Toronto, Central East,
Central West, Eastern, South West and North East health regions reported ?localized? level influenza activity; and
the North West health region reported sporadic activity. The ILI rate is higher than the average rate for week 6

from previous years.
...

Hospitalizations and deaths among laboratory confirmed influenza cases, Sep. 1, 2010 ? Feb. 12, 2011

As of February 12, 2011, 1364 hospitalizations and 117 deaths have been reported among lab confirmed
influenza cases reported in Ontario for the 2010-2011 season. Most of the hospitalizations and deaths have
occurred in influenza A cases. The highest rates of hospitalization have been observed in people under the age
of five and 65 years of age and older. The highest rates of death have been seen in people 65 years of age and

older.

Full report:
http://www.health.gov.on.ca/en/pro/p...l_20110218.pdf

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Re: Ontario Influenza Bulletin 2010-2011 - Surveillance week 7 - 127 deaths total

Ontario Influenza Bulletin, 2010-2011
Surveillance Week 7 (February 13, 2011 ? February 19, 2011)
Produced by: Surveillance Section, Public Health Protection and Prevention Branch

Overall, influenza activity in Ontario during week 7, 2011, was lower when compared to week 6, 2011. Ontario
health units reported 295 new laboratory confirmed cases of influenza for the current week through the integrated
Public Health Information System (iPHIS). A total of 585 institutional respiratory infection outbreaks have been
reported in the 2010/11 season up to Week 7, including 7 new influenza outbreaks from North East (2), Central
West (2), Eastern (1), South West (1), and Toronto (1) health regions. For week 7, Toronto, Central East, Central
West, Eastern, South West, North West and North East health regions reported ?localized? level influenza activity.

The ILI rate is higher than the average rate for week 7 from previous years.

Hospitalizations and deaths among laboratory confirmed influenza cases, Sep. 1, 2010 ? Feb. 19, 2011

As of February 19, 2011, 1509 hospitalizations and 127 deaths have been reported among lab confirmed
influenza cases reported in Ontario for the 2010-2011 season. Most of the hospitalizations and deaths have
occurred in influenza A cases. The highest rates of hospitalization have been observed in people under the age
of five and 65 years of age and older. The highest rates of death have been seen in people 65 years of age and

older.

Full report:
http://www.health.gov.on.ca/en/pro/p...l_20110225.pdf

[Pathfinder]

Re: Ontario Influenza Bulletin 2010-2011 - Surveillance week 8 - 142 deaths total

Ontario Influenza Bulletin, 2010-2011
Surveillance Week 8 (February 20, 2011 ? February 26, 2011)

Overall, influenza activity in Ontario during week 8, 2011, was lower when compared to week 7, 2011. Ontario
health units reported 299 new laboratory confirmed cases of influenza for the current week through the integrated
Public Health Information System (iPHIS). A total of 610 institutional respiratory infection outbreaks have been
reported in the 2010/11 season up to Week 8, including 2 new influenza A outbreaks from Central West (1) and
South West (1) health regions. For week 8, Central East, Central West, Eastern, South West and North East
health regions reported ?localized? level influenza activity while North West and Toronto reported ?sporadic? level

activity. The ILI rate is higher than the average rate for week 8 from previous years.

Hospitalizations and deaths among laboratory confirmed influenza cases, Sep. 1, 2010 ? Feb. 26, 2011

As of February 26, 2011, 1668 hospitalizations and 142 deaths have been reported among lab confirmed
influenza cases reported in Ontario for the 2010-2011 season. Most of the hospitalizations and deaths have
occurred in influenza A cases. The highest rates of hospitalization have been observed in people under the age
of five and 65 years of age and older. The highest rates of death have been seen in people 65 years of age and

older.

Full report:
http://www.health.gov.on.ca/en/pro/p...l_20110304.pdf

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Re: Ontario Influenza Bulletin 2010-2011 - Surveillance week 9 - 164 deaths total

Ontario Influenza Bulletin, 2010-2011
Surveillance Week 9 (February 27, 2011 ? March 5, 2011)

Overall, influenza activity in Ontario during week 9, 2011, was similar to week 8, 2011. Ontario health units
reported 186 new laboratory confirmed cases of influenza for the current week through the integrated Public
Health Information System (iPHIS). A total of 645 institutional respiratory infection outbreaks have been reported
in the 2010/11 season up to Week 9, including 4 new influenza A outbreaks from North East (2), Eastern (1) and
Central East (1) health regions. For week 9, Central East, Central West, Eastern, South West and North East
health regions reported ?localized? level influenza activity while North West and Toronto reported ?sporadic? level

activity. The ILI rate is higher than the average rate for week 9 from previous years.

Hospitalizations and deaths among laboratory confirmed influenza cases, Sep. 1, 2010 ? Mar. 5, 2011

As of March 5, 2011, 1815 hospitalizations and 164 deaths have been reported among lab confirmed influenza
cases reported in Ontario for the 2010-2011 season. Most of the hospitalizations and deaths have occurred in
influenza A cases. The highest rates of hospitalization have been observed in people under the age of five and

65 years of age and older. The highest rates of death have been seen in people 65 years of age and older.

Full report:
http://www.health.gov.on.ca/en/pro/p...l_20110311.pdf

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Re: Ontario Influenza Bulletin 2010-2011 - Surveillance week 10 - 172 deaths total

Ontario Influenza Bulletin, 2010-2011
Surveillance Week 10 (March 6, 2011 ? March 12, 2011)

Overall, influenza activity in Ontario during week 10, 2011, was lower to week 9, 2011. Ontario health units
reported 142 new laboratory confirmed cases of influenza for the current week through the integrated Public
Health Information System (iPHIS). A total of 684 institutional respiratory infection outbreaks have been reported
in the 2010/11 season up to Week 10, including 1 new influenza A outbreak from South West health region and 1
new influenza B outbreak from Central West health region. For week 10, Central East, Central West, Eastern,
South West, North East and Toronto health regions reported ?localized? level influenza activity while North West

?sporadic? level activity. The ILI rate is higher than the average rate for week 10 from previous years.
...

Hospitalizations and deaths among laboratory confirmed influenza cases, Sep. 1, 2010 ? Mar. 12, 2011

As of March 12, 2011, 1885 hospitalizations and 172 deaths have been reported among lab confirmed influenza
cases reported in Ontario for the 2010-2011 season. Most of the hospitalizations and deaths have occurred in
influenza A cases. The highest rates of hospitalization have been observed in people under the age of five and

65 years of age and older. The highest rates of death have been seen in people 65 years of age and older.


Full report:

http://www.health.gov.on.ca/en/pro/programs/publichealth/flu/bulletins/2010/docs/flu_bul_20110318.pdf

[Pathfinder]

Re: Ontario Influenza Bulletin 2010-2011 - Surveillance week 11 - 178 deaths total

Ontario Influenza Bulletin, 2010-2011
Surveillance Week 11 (March 13, 2011 ? March 19, 2011)

Overall, influenza activity in Ontario during week 11, 2011, was lower compared to week 10, 2011. Ontario health
units reported 120 new laboratory confirmed cases of influenza for the current week through the integrated Public
Health Information System (iPHIS). A total of 715 institutional respiratory infection outbreaks have been reported
in the 2010/11 season up to Week 11, including 2 new influenza A outbreaks from North East and Central West
health regions. For week 11, all 7 health regions reported ?localized? level influenza activity (Central East, Central
West, Eastern, South West, North East, North West and Toronto). The ILI rate is slightly higher than the average

rate for week 11 from previous years.

...

Hospitalizations and deaths among laboratory confirmed influenza cases, Sep. 1, 2010 ? Mar. 19, 2011

As of March 19, 2011, 1971 hospitalizations and 178 deaths have been reported among lab confirmed influenza
cases reported in Ontario for the 2010-2011 season. Most of the hospitalizations and deaths have occurred in
influenza A cases. The highest rates of hospitalization have been observed in people under the age of five and

65 years of age and older. The highest rates of death have been seen in people 65 years of age and older.

Full report:
http://www.health.gov.on.ca/en/pro/p...l_20110325.pdf

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Re: Ontario Influenza Bulletin 2010-2011 - Surveillance week 12 - 2050 hospitalizations and 180 deaths (total)

Ontario Influenza Bulletin, 2010-2011
Surveillance Week 12 (March 20, 2011 ? March 26, 2011)

Overall, influenza activity in Ontario during week 12, 2011, was lower compared to week 11, 2011. Ontario health
units reported 89 new laboratory confirmed cases of influenza for the current week through the integrated Public
Health Information System (iPHIS). A total of 747 institutional respiratory infection outbreaks have been reported
in the 2010/11 season up to Week 12, including 2 new influenza A outbreaks from North East and South West
health regions and 1 new influenza B outbreak from Toronto health region. For week 12, Central East and South
West health regions reported ?sporadic? level influenza activity while the remaining health regions(Central West,
Eastern, North East, North West and Toronto) reported ?localized? level influenza activity. The ILI rate is lower

than the average rate for week 12 from previous years.
...

Hospitalizations and deaths among laboratory confirmed influenza cases, Sep. 1, 2010 ? Mar. 26, 2011

As of March 26, 2011, 2050 hospitalizations and 180 deaths have been reported among lab confirmed influenza
cases reported in Ontario for the 2010-2011 season. Most of the hospitalizations and deaths have occurred in
influenza A cases. The highest rates of hospitalization have been observed in people under the age of five and

65 years of age and older. The highest rates of death have been seen in people 65 years of age and older.

Full report:
http://www.health.gov.on.ca/en/pro/p...l_20110401.pdf

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Re: Ontario Influenza Bulletin 2010-2011 - Surveillance week 13 - 2110 hospitalizations and 186 deaths (total)

Ontario Influenza Bulletin, 2010-2011
Surveillance Week 13 (March 27, 2011 ? April 2, 2011)

Overall, influenza activity in Ontario during week 13, 2011, was slightly higher compared to week 12, 2011.
Ontario health units reported 112 new laboratory confirmed cases of influenza for the current week through the
integrated Public Health Information System (iPHIS). A total of 788 institutional respiratory infection outbreaks
have been reported in the 2010/11 season up to Week 13, including 3 new influenza A outbreaks from Central
West and South West health regions and 1 new influenza B outbreak from Eastern health region. For week 13,
Toronto health region reported ?sporadic? level influenza activity while the remaining health regions (Central West,
Central East, Eastern, North East, North West and South West) reported ?localized? level influenza activity. The ILI

rate is lower than the average rate for week 13 from previous years.
...

Hospitalizations and deaths among laboratory confirmed influenza cases, Sep. 1, 2010 ? Apr. 2, 2011

As of April 2, 2011, 2110 hospitalizations and 186 deaths have been reported among lab confirmed influenza
cases reported in Ontario for the 2010-2011 season. Most of the hospitalizations and deaths have occurred in
influenza A cases. The highest rates of hospitalization have been observed in people under the age of five and

65 years of age and older. The highest rates of death have been seen in people 65 years of age and older.

Full report:
http://www.health.gov.on.ca/en/pro/p...l_20110408.pdf