Colorado 2015-16 Flu Season

[Ronan Kelly]

Influenza Season 2015 - 2016
Reporting through the week ending April 16, 2016

https://www.colorado.gov/pacific/sites/default/files/DC_ComDis-Influenza-Report_2.pdf

Synopsis
For the week ending April 16, flu activity decreased across the state. After accounting for reporting delays,
the number of hospitalizations due to influenza appears to have peaked the week ending March 12, 2016.
 There were 85 additional influenza-associated hospitalizations reported; 43 with a collection date during
the week ending April 16 and 42 from previous weeks. The total number of hospitalizations was 1422
from 50 counties. It is unclear if the number of hospitalizations due to influenza B has peaked yet. (See
Figures 1 and 2 and Tables 1 and 2.)
 Influenza-like illness reported by Kaiser Permanente for the Denver-Boulder metropolitan area fell to
1.0% (compared to 1.3% the previous week). Influenza-like illness reported by Mesa County decreased to
0.9% (compared to 1.0% the previous week). (See Figures 3 and 4.)
 Since Oct. 4, 2015, 1598 specimens have been sent to the State lab for confirmation (457 from inpatient
hospital visits and 1141 from outpatient hospital visits). Of the 1366 PCR positive tests, 1213 (88.8%)
tested positive for influenza A and 153 (11.2%) tested positive for influenza B. Among influenza A
positive specimens, 243 (17.8%) were H3N2 and 968 (70.9%) were 2009 H1N1. (See Table 3.)
 Sentinel hospital labs (23 of 25 reporting) tested 1236 specimens and 129 (10.4%) were positive for
influenza. (See Figure 5.)
 25 outbreaks associated with influenza in a long-term care facility have been reported thus far.
 The first pediatric death associated with influenza of the season was confirmed during the week ending
March 26.
 Among recent seasons, this is the latest influenza peak week since 2011-2012.
...

[Ronan Kelly]

Influenza Season 2015 - 2016
Reporting through the week ending April 9, 2016

https://www.colorado.gov/pacific/sites/default/files/DC_ComDis-Influenza-Report_1.pdf

Synopsis
For the week ending April 9, flu activity decreased across the state. After accounting for reporting delays,
the number of hospitalizations due to influenza appears to have peaked the week ending March 12, 2016.
 There were 122 additional influenza-associated hospitalizations reported; 75 with a collection date
during the week ending April 9 and 47 from previous weeks. The total number of hospitalizations was
1337 from 49 counties. The number of hospitalizations due to influenza B appears to have peaked the
week ending March 26, 2016. (See Figures 1 and 2 and Tables 1 and 2.)
 Influenza-like illness reported by Kaiser Permanente for the Denver-Boulder metropolitan area fell to
1.3% (compared to 1.5% the previous week). Influenza-like illness reported by Mesa County decreased to
1.0% (compared to 1.3% the previous week). (See Figures 3 and 4.)
 Since Oct. 4, 2015, 1557 specimens have been sent to the State lab for confirmation (420 from inpatient
hospital visits and 1137 from outpatient hospital visits). Of the 1331 PCR positive tests, 1194 (89.7%)
tested positive for influenza A and 137 (10.3%) tested positive for influenza B. Among influenza A
positive specimens, 229 (17.2%) were H3N2 and 963 (72.4%) were 2009 H1N1. (See Table 3.)
 Sentinel hospital labs (21 of 25 reporting) tested 1292 specimens and 180 (13.9%) were positive for
influenza. (See Figure 5.)
 21 outbreaks associated with influenza in a long-term care facility have been reported thus far.
 The first pediatric death associated with influenza of the season was confirmed during the week ending
March 26.
 Among recent seasons, this is the latest influenza peak week since 2011-2012. (See Figure 6.)
...

[Ronan Kelly]

Influenza Season 2015 - 2016
Reporting through the week ending April 2, 2016

https://www.colorado.gov/pacific/sites/default/files/DC_ComDis-Influenza-Report_1.pdf

Synopsis
For the week ending April 2, flu activity decreased across the state. After accounting for reporting delays,
hospitalizations due to influenza appear to have peaked the week ending March 12, 2016.
? There were 176 additional influenza-associated hospitalizations reported; 95 with a collection date
during the week ending April 2 and 81 from previous weeks. The total number of hospitalizations was
1215 from 21 counties. (See Figures 1 and 2 and Tables 1 and 2.)
? Influenza-like illness reported by Kaiser Permanente for the Denver-Boulder metropolitan area fell to
1.5% (compared to 1.8% the previous week). Influenza-like illness reported by Mesa County decreased to
1.3% (compared to 1.4% the previous week). (See Figures 3 and 4.)
? Since Oct. 4, 2015, 1532 specimens have been sent to the State lab for confirmation (389 from inpatient
hospital visits and 1143 from outpatient hospital visits). Of the 1286 PCR positive tests, 1162 (90.4%)
tested positive for influenza A and 124 (9.6%) tested positive for influenza B. Among influenza A positive
specimens, 218 (17.0%) were H3N2 and 943 (73.3%) were 2009 H1N1. (See Table 3.)
? Sentinel hospital labs (24 of 25 reporting) tested 1696 specimens and 275 (16.2%) were positive for
influenza. (See Figure 5.)
? 14 outbreaks associated with influenza in a long-term care facility have been reported thus far.
? The first pediatric death associated with influenza of the season was confirmed during the week ending
March 26.
...

[Ronan Kelly]

Highlands Ranch Child 1st Flu Death Of Season
April 6, 2016 4:17 PM

HIGHLANDS RANCH, Colo. (CBS4) ? A little girl from Highlands Ranch was the first death from flu this season in Colorado.
...

http://denver.cbslocal.com/2016/04/06/highlands-ranch-child-1st-flu-death-of-season/

[Ronan Kelly]

Reporting through the week ending March 26, 2016

https://www.colorado.gov/pacific/sites/default/files/DC_ComDis-Flu-Report.pdf

Synopsis
For the week ending March 26, flu activity decreased slightly across the state.
 There were 151 additional influenza-associated hospitalizations reported; 85 with a collection date
during the week ending March 26 and 66 from previous weeks. The total number of hospitalizations was
1039 from 44 counties. See Figures 1 and 2 and Tables 1 and 2.
 Influenza-like illness reported by Kaiser Permanente for the Denver-Boulder metropolitan area fell to
1.8% (compared to 1.9% the previous week). Influenza-like illness reported by Mesa County decreased to
1.4% (compared to 1.6% the previous week). See Figures 3 and 4.
 Since Oct. 4, 2015, 1449 specimens have been sent to the State lab for confirmation (346 from inpatient
hospital visits and 1103 from outpatient hospital visits). Of the 1227 PCR positive tests, 1118 (91.1%)
tested positive for influenza A and 109 (8.9%) tested positive for influenza B. Among influenza A positive
specimens, 194 (15.8%) were H3N2 and 923 (75.2%) were 2009 H1N1. See Table 3.
 Sentinel hospital labs (24 of 25 reporting) tested 1972 specimens and 363 (18.4%) were positive for
influenza. See Figure 5.
 10 outbreaks associated with influenza in a long-term care facility have been reported thus far.
 One pediatric death associated with influenza was been confirmed during the week ending March 26.
...

[Ronan Kelly]

Reporting through the week ending March 19, 2016

https://www.colorado.gov/pacific/sites/default/files/DC_ComDis_Flu_Report.pdf

Synopsis
For the week ending March 19, flu activity continued to increase across the state.
? There were 183 additional influenza-associated hospitalizations reported; 117 with a collection date
during the week ending March 19 and 66 from previous weeks. The total number of hospitalizations was
888 from 42 counties. See Figures 1 and 2 and Tables 1 and 2.
? Influenza-like illness reported by Kaiser Permanente for the Denver-Boulder metropolitan area fell to
1.9% (compared to 2.2% the previous week). Influenza-like illness reported by Mesa County increased to
1.6% (compared to 1.2% the previous week). See Figures 3 and 4.
? Since Oct. 4, 2015, 1373 specimens have been sent to the State lab for confirmation (320 from inpatient
hospital visits and 1053 from outpatient hospital visits). Of these, 1057 (91.0%) tested positive for
influenza A and 105 tested positive for influenza B. Among influenza A positive specimens, 162 (11.8%)
were H3N2 and 894 (76.9%) were 2009 H1N1. See Table 3.
? Sentinel hospital labs (22 of 25 reporting) tested 1875 specimens and 369 (19.7%) were positive for
influenza. See Figure 5.
? 10 outbreaks associated with influenza in a long-term care facility have been reported thus far.
? No pediatric deaths associated with influenza have been confirmed thus far.
...

[Ronan Kelly]

Reporting through the week ending March 12, 2016

https://www.colorado.gov/pacific/sites/default/files/DC_ComDis-Influenza-Report_2.pdf

Synopsis
For the week ending March 12, flu activity continued to increase across the state.
? There were 189 additional influenza-associated hospitalizations reported; 125 with a collection date
during the week ending March 12 and 64 from previous weeks. The total number of hospitalizations was
705 from 38 counties.
? Influenza-like illness reported by Kaiser Permanente for the Denver-Boulder metropolitan area increased
to 2.2% (compared to 1.7% the previous week). Influenza-like illness reported by Mesa County decreased
to 1.2% (compared to 1.4% the previous week).
? Since Oct. 4, 2015, 1235 specimens have been sent to the State lab for confirmation (280 from inpatient
hospital visits and 955 from outpatient hospital visits). Of these, 943 (92.2%) tested positive for influenza
A and 80 tested positive for influenza B. Among influenza A positive specimens, 122 (9.9%) were H3N2
and 820 (80.2%) were 2009 H1N1.
? Sentinel hospital labs (22 of 25 reporting) tested 2219 specimens and 403 (18.2%) were positive for
influenza.
? 10 outbreaks associated with influenza in a long-term care facility have been reported thus far.
? No pediatric deaths associated with influenza have been confirmed thus far.
...

[Ronan Kelly]

Reporting through the week ending March 05, 2016

https://www.colorado.gov/pacific/sites/default/files/DC_ComDis-Influenza-Report_1.pdf

Synopsis
For the week ending March 5, flu activity continued to increase across the state.
? There were 153 additional influenza-associated hospitalizations reported; 100 with a collection date
during the week ending March 5 and 53 from previous weeks. The total number of hospitalizations was
516 from 28 counties.
? Influenza-like illness reported by Kaiser Permanente for the Denver-Boulder metropolitan area increased
slightly to 1.7% (compared to 1.6% the previous week). Influenza-like illness reported by Mesa County
increased to 1.4% (compared to 1.2% the previous week).
? Since Oct. 4, 2015, 953 specimens have been sent to the State lab for confirmation (218 from inpatient
hospital visits and 735 from outpatient hospital visits). Of these, 716 (92.1%) tested positive for influenza
A and 61 tested positive for influenza B. Among influenza A positive specimens, 62 (6.5%) were H3N2 and
654 (84.2%) were 2009 H1N1.
? Sentinel hospital labs (22 of 25 reporting) tested 2020 specimens and 351 (17.4%) were positive for
influenza.
? Seven outbreaks associated with influenza in a long-term care facility have been reported thus far.
? No pediatric deaths associated with influenza have been confirmed thus far.
...

[Ronan Kelly]

Reporting through the week ending Feb. 27, 2016

https://www.colorado.gov/pacific/sites/default/files/DC_ComDis-Influenza-Report_1.pdf

Synopsis
For the week ending February 27, flu activity continues to increase across the state.
? There were 79 additional influenza-associated hospitalizations reported; 50 with a collection date during
the week ending February 27 and 29 from previous weeks. The total number of hospitalizations is 364
from 27 counties.
? Influenza-like illness reported by Kaiser Permanente for the Denver-Boulder metropolitan area remained
nearly steady at 1.65% (compared to 1.6% the previous week). Influenza-like illness reported by Mesa
County stayed steady at 1.2%.
? Since Oct. 4, 2015, 654 specimens have been sent to the State lab for confirmation (169 from inpatient
hospital visits and 485 from outpatient hospital visits). Of these, 466 (93%) have tested positive for
influenza A and 35 have tested positive for influenza B. Among influenza A positive specimens, 31 (4.7%)
were H3N2 and 435 (86.8%) were 2009 H1N1.
? Sentinel hospital labs (20 of 25 reporting) tested 1512 specimens and 234 (15.5%) were positive for
influenza.
? Five outbreaks associated with influenza in a long-term care facility have been reported thus far.
? No pediatric deaths associated with influenza have been confirmed thus far
...

[Ronan Kelly]

Reporting through the week ending Feb. 20, 2016

https://www.colorado.gov/pacific/sites/default/files/DC_ComDis-Influenza-Report_1.pdf

Synopsis
For the week ending February 20, flu activity remained low but continues to increase across the state.
? There were 67 additional influenza-associated hospitalizations reported; 42 with a collection date during
the week ending February 20, and 25 from previous weeks. The total number of hospitalizations is 285
from 25 counties.
? Influenza-like illness reported by Kaiser Permanente for the Denver-Boulder metropolitan area is not
currently available. Influenza-like illness reported by Mesa County increased to 1.2% (compared to 1.0%
during the previous week).
? Since Oct. 4, 2015, 609 specimens have been sent to the State lab for confirmation (162 from inpatient
hospital visits and 447 from outpatient hospital visits). Of these, 427 (70.1%) have tested positive for
influenza A and 33 have tested positive for influenza B. Of the influenza A positive specimens, 29 (7.0%)
were H3N2 and 398 (93.2%) were 2009 H1N1.
? Sentinel hospital labs (20 of 25 reporting) tested 1050 specimens and 151 (14.1%) were positive for
influenza.
? Two outbreaks associated with influenza in a long-term care facility have been reported thus far.
? No pediatric deaths associated with influenza have been confirmed thus far.
...

[Ronan Kelly]

Reporting through the week ending Feb. 13, 2016

https://www.colorado.gov/pacific/sites/default/files/DC_ComDis-Influenza-Report_1.pdf

Synopsis
For the week ending February 13, flu activity remained low but is increasing across the state.
? There were 51 additional influenza-associated hospitalizations reported; 33 with a collection date during
the week ending February 13, and 18 from previous weeks. The cumulative total of hospitalizations is
218 from 24 counties.
? Influenza-like illness reported by Kaiser Permanente for the Denver-Boulder metropolitan area is not
available for the current week. Influenza-like illness reported by Mesa County decreased to 1.0%
(compared to 1.1% during the previous week).
? Since Oct. 4, 2015, 456 specimens have been sent to the State lab for confirmation (126 from inpatient
hospital visits and 330 from outpatient hospital visits). Of these, 299 (65.6%) have tested positive for
influenza A and 24 have tested positive for influenza B. Of the influenza A positive specimens, 27 (9%)
were H3N2 and 272 (91%) were 2009 H1N1.
? Sentinel hospital labs (22 of 25 reporting) tested 1113 specimens and 99 (8.9%) were positive for
influenza.
? Two outbreaks associated with influenza in a long-term care facility have been reported thus far.
? No pediatric deaths associated with influenza have been confirmed thus far.
...

[Ronan Kelly]

Reporting through the week ending Feb. 6, 2016

https://www.colorado.gov/pacific/sites/default/files/DC_ComDis-Influenza-Report_1.pdf

Synopsis
For the week ending February 6, flu activity remained low but is increasing across the state.
? There were 40 additional influenza-associated hospitalizations reported; 29 with a collection date during
the week ending February 6, and 11 from previous weeks. The cumulative total of hospitalizations is 167
from 19 counties.
? Influenza-like illness reported by Kaiser Permanente for the Denver-Boulder metropolitan area is not
available for the current week. Influenza-like illness reported by Mesa County increased to 1.1%
(compared to 0.8% during the previous week).
? Since Oct. 4, 2015, 381 specimens have been sent to the State lab for confirmation (107 from inpatient
hospital visits and 274 from outpatient hospital visits). Of these, 239 (60%) have tested positive for
influenza A and 21 have tested positive for influenza B. Of the influenza A positive specimens, 25 (10.4%)
were H3N2 and 214 (89.6%) were 2009 H1N1.
? Sentinel hospital labs (24 of 25 reporting) tested 1075 specimens and 80 (7.4%) were positive for
influenza.
? One outbreak associated with influenza in a long-term care facility has been reported thus far.
? No pediatric deaths associated with influenza have been confirmed thus far.
...

[Ronan Kelly]

Influenza Season 2015 - 2016
Reporting through the week ending Jan. 30, 2016

https://www.colorado.gov/pacific/sites/default/files/DC_ComDis-Influenza_Report.pdf

Synopsis
For the week ending January 30, flu activity remained low but is increasing across the state.

? There were 35 additional influenza-associated hospitalizations reported; 21 with a collection date during
the week ending January 30 and 11 from previous weeks. The cumulative total of hospitalizations is 127
from 16 counties.
? Influenza-like illness reported by Kaiser Permanente for the Denver-Boulder metropolitan area increased
to 1.2% (compared to 0.9% the previous week). Influenza-like illness reported by Mesa County also
remained low at 0.8% (compared to 0.9% during the previous week).
? Since Oct. 4, 2015, 306 specimens have been sent to the State lab for confirmation (87 from inpatient
hospital visits and 219 from outpatient hospital visits). Of these, 183 (60%) have tested positive for
influenza A and 15 have tested positive for influenza B. Of the influenza A positive specimens, 23 (12.6%)
were H3N2 and 160 (87.4%) were 2009 H1N1.
? Sentinel hospital labs (24 of 25 reporting) tested 1047 specimens and 70 (6.7%) were positive for
influenza. Caution should be used when interpreting these data based on the possibility of false positive
results with the current use of rapid flu tests.
? One outbreak associated with influenza in a long-term care facility has been reported thus far.
? No pediatric deaths associated with influenza have been confirmed thus far
...

[mixin]

https://www.colorado.gov/pacific/cdphe/influenza-data

Synopsis: For the week ending October 31st, flu activity was minimal.

* Since the official start of the 2015/16 season, two influenza-associated hospitalizations have been confirmed (both during the week ending 10/24). No influenza-associated hospitalizations were confirmed during the most recent week (10/31).
* Influenza-like illness reported by Kaiser Permanente for the Denver-Boulder metropolitan area increased slightly from 0.6% to 0.7%, but remained below seasonal baseline (1.0%). Influenza-like illness reported by Mesa County remained low at 0.5%.
* Sentinel hospital labs (19/25 reporting) tested 407 specimens and 6 were positive for influenza (three each for influenza A and influenza B). Caution should be used when interpreting these data based on the possibility of false positive results with the current use of rapid flu tests
* Since 10/4/2015, 15 specimens have been sent to the State lab for confirmation (seven from inpatient hospital visits and eight from outpatient hospital visits). Of which, two (13%) confirmed positive for influenza A (H3).
* No outbreaks associated with influenza have been reported thus far.  No pediatric deaths associated with influenza have been reported thus far.

To view the weekly CDC flu surveillance Reports, go to: http://www.cdc.gov/flu/about/season/index.htm