h1n1 influenza in boston: past, present, and future media briefing boston public health commission...
TRANSCRIPT
![Page 1: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/1.jpg)
H1N1 Influenza in Boston:Past, Present, and Future
Media BriefingBoston Public Health Commission
August 17, 2009
![Page 2: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/2.jpg)
Age Distribution of CasesAs of July 31, 2009, 480 cases of confirmed novel H1N1 influenza have been identified in Boston.
Of the confirmed cases, 296 (62%) are under 18 years of age, with a median age of 13. 18% of cases are under age 5 and 91% are under age 45; only 41 cases (9%) have been over age 45.
![Page 3: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/3.jpg)
![Page 4: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/4.jpg)
Novel H1N1 Diagnosing Health Care Sites: April-July, 2009
![Page 5: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/5.jpg)
Weekly incidence rates of H1N1 Influenza cases, by zipcodeApril 26 to June 6, 2009
![Page 6: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/6.jpg)
Gender of Novel H1N1 Cases Compared to the Boston Population
![Page 7: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/7.jpg)
Race/Ethnicity of Novel H1N1 Cases Compared to the Boston Population
![Page 8: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/8.jpg)
Race/Ethnicity of Hospitalized Novel H1N1 Influenza Cases
Black 35 (49%)Hispanic 20 (28%)Other 5(7%)White 11 (15%)
![Page 9: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/9.jpg)
Characteristics of 71 Hospitalized Novel H1N1 Boston Cases
Characteristic N (%)
Age Group 0-4 years 20 (28%)
5-17 years 22 (31%)
18-44 years 16 (23%)
45-64 years 8 (11%)
65+ years 5 (7%)
ICU Admission 26 (37%)
Asthma 35 (49%)
Pneumonia 26 (37%)
Respiratory Support CPAP/BIPAP 10 (14%)
Intubation 7 (10%)
![Page 10: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/10.jpg)
Reported Influenza A* and Novel H1N1 Influenza by Neighborhood: April-July, 2009
*Estimated that the majority were H1N1Novel H1N1 = 477 cases; Influenza A = 508 cases
![Page 11: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/11.jpg)
ED Visits for Influenza-like Illness (ILI)
Summary of Boston Emergency Department Visits
Time period (60 days) Total Visits* Visits for ILI** (% of all visits)
April 15 - June 14, 2009 94,915 3,907 (4.1%)
April 15 - June 14, 2008 85,122 652 (0.7%)
January 7 - March 8, 2009 84,904 1,688 (1.9%)(2009 influenza season)
*visits to 10 Boston emergency departments
**ILI defined as "flu" or "fever and a respiratory symptom", as described in the patient's chief complaint
The Boston Public Health Commission closely monitors emergency department visits for influenza-like illness (ILI) and other respiratory conditions.
From April 15 to June 14, 2009, total visits and visits for ILI increased significantly. During that period 4.1% of all visits were for ILI, compared with 0.7% during the same time period in 2008, and 1.9% during the peak of the 2009 seasonal influenza season, from January 7 to March 8, 2009.
![Page 12: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/12.jpg)
Percent of Emergency Department Visits for Influenza-like Illness2009 vs. prior years
![Page 13: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/13.jpg)
Estimated impact of H1N1 by neighborhood
Estimated
CasesPopulatio
n* % AffectedBoston, MA 23,388 589,230 4.0%
Overall neighborhood estimates, by percent affected
Above Citywide average (>4.3%) Est. Cases Population % AffectedEast Boston 3,082 38,413 8.0%
Roxbury 2,077 34,665 6.0%Fenway 2,698 47,449 5.7%
Allston/Brighton 3,296 66,467 5.0%North Dorchester 3,018 58,675 5.1%South Dorchester 3,444 75,329 4.6%
Mattapan 1,226 27,815 4.4%Total, neighborhoods with high activity 18,841 348,813 5.4%
Below Citywide average (<4.3%) Hyde Park 1,029 28,392 3.6%Roslindale 1,168 32,527 3.6%
Charlestown 420 15,195 2.8%South Boston 542 30,048 1.8%
South End 397 27,311 1.5%Jamaica Plain 329 36,293 0.9%
Back Bay/Beacon Hill/West End/North End/Downtown 232 46,258 0.5%
West Roxbury 169 24,058 0.7%Total, neighborhoods with low activity 4,286 240,082 1.8%
![Page 14: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/14.jpg)
School ClosingsHigh, sustained rates of absenteeism caused by influenza-like illness led to temporary school closures in certain instances.
School closures were recommended on a case by case basis, and lasted an average of 7 days.
![Page 15: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/15.jpg)
Burden of H1N1 Influenza Activity: School Assessment Findings
Compared to schools that remained open, closed schools:– experienced greater burden of H1N1 influenza activity, as
measured by staff out sick and students sent home sick – were more likely to report difficulty keeping ill students
out of school (44% vs. 27%)
![Page 16: H1N1 Influenza in Boston: Past, Present, and Future Media Briefing Boston Public Health Commission August 17, 2009](https://reader036.vdocuments.us/reader036/viewer/2022081504/56649ea85503460f94bab936/html5/thumbnails/16.jpg)
Percent Attendance in Closed Boston Public Schools
School February Baseline Pre-Closure* Post-Closure*
A 95 78 87
B 96 89 96
C 94 88 88
D 91 77 90
E 94 88 90
F 93 77 90
G 95 78 93
H 95 69 89
I 95 69 83
J 95 79 94
K 92 84 86