Spreading Knowledge Faster than Disease · 2019-05-31 · Spreading Knowledge Faster than Disease...
Transcript of Spreading Knowledge Faster than Disease · 2019-05-31 · Spreading Knowledge Faster than Disease...
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Spreading Knowledge Faster than Disease
Kamran Khan MD, MPH, FRCPC Physician-Scientist
St. Michael’s Hospital Li Ka Shing Knowledge Institute
Professor Faculty of Medicine, Division of Infectious Diseases
Dalla Lana School of Public Health University of Toronto
Founder & CEO BlueDot
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Population Growth
Urbanization
Climate Change Global Air Travel
Deforestation
Antibiotic Resistance
Mass Livestock Production
Mass Gatherings
Bioterrorism
Vaccine Hesitancy
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New Diseases are Emerging Faster
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Old Diseases are Reemerging
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Others are Expanding their Geographic Range
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Dangerous Microbes are More Easily Created
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Humans are Spreading Diseases Faster and Farther
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Growing Global Risks
Low frequency - high consequence events
High frequency - low consequence events
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The world needs a global early warning system for infectious diseases
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ASSESS RESPONDDETECT
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Map Global DiseasesMalaria Transmission Risk
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Map Local DiseasesLyme Transmission Risk
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Use A.I. to Track Global Outbreaks in Real-Time
ProMED Mail
WHO-OIE-FAO
Google News
NLP ML
UNSTRUCTURED TEXT DATA
STRUCTURED SPATIAL DATA
PathogenLocation - Time
Contextual Factors
100+ languages100+ diseases
>99%DEDUPLICATION AND ELIMINATION OF LOW
RELEVANCE DATA
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ASSESS RESPONDDETECT
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In New Tools to Combat Epidemics, the Key Is Context
“All the News That’s Fit to Print” Reprinted With PermissionTHURSDAY, JUNE 20, 2013
By AMY O’LEARY
Not long ago, Google Flu seemed like magic — a smart, cheap way to sift digital data for the
public good.But Google Flu, which tries to track
flu outbreaks faster than the govern-ment, has shown its limitations. Not only did it grossly overestimate the flu this year, but its methods did lit-tle to track new, deadly diseases that could emerge anywhere, in places as random as a mass religious gathering on the banks of the Ganges or a poul-try market in Shanghai.
Now a new project called BioMosaic is building a more comprehensive pic-ture of foreign-borne disease threats in the United States, by merging three separate data tools into a single app for guiding decisions at the time of an outbreak.
“The best way to get these big- picture perspectives is to look at mul-tiple layers of data,” said Dr. Marty Cetron, the director of the division of global migration and quarantine at the federal Centers for Disease Control and Prevention, who had the idea for the project.
By combining airline records, dis-ease reports and demographic data, BioMosaic lets public health officials visualize health risks through a Web site and an iPad app. They can then deploy preventive measures to individ-ual cities, counties or even hospitals to help thwart a larger crisis.
For example, after the 2010 earth-quake in Haiti and subsequent chol-era epidemic, BioMosaic showed where clusters of the 500,000 to 800,000 Haitian-born residents in the Unit-ed States were most likely to live, along with air and sea travel routes to and from Haiti, to pinpoint where anti-cholera measures in the United States would be most useful.
“It really helps you get right to the heart of the matter: that concept that
a global event in Haiti becomes a local event in five counties in Florida and five counties in New York,” Dr. Cetron said. “When you see it, you get these aha! moments of appreciation.”
One of the doctors in the field who can benefit from these types of insights is Dr. Kamran Khan, an infectious disease specialist and researcher at St. Michael’s Hospital in Toronto.
Dr. Khan, who said he had a “bad habit of being around emerging dis-eases,” has worked on the front lines of the 1999 West Nile virus outbreak and the H1N1 pandemic of 2009. But the event that hit closest to home was when his own hospital was affected by a deadly outbreak of severe acute re-spiratory syndrome, or SARS, which hit Toronto in 2003.
That spring, the city had received an infected passenger from Hong Kong who passed SARS to family mem-bers, activating quarantine measures across the city. Despite those efforts, 44 people eventually died across Cana-da, including two nurses and a doctor.
“No one wanted to come near you,” he said. “You quickly became an out-cast in society.”
Once the outbreak was over, stud-ies showed that cities like Toronto, with direct flights from Hong Kong, were 25 times as likely to record SARS cases as cities that could be reached only through a connecting flight. Cit-ies that were two flight connections away from Hong Kong never observed a single case.
“It was this moment of recognizing the world is extremely interconnect-ed,” Dr. Khan said.
That was the impetus for him to start digging for data on human move-ments around the globe in his project called BioDiaspora, from interna-tional air travel to large mass gath-erings like the hajj, the Olympics or the World Cup.
Dr. Khan spent years negotiating with air traffic organizations, govern-
ments and airlines to amass a data-base of human movement around the globe, encompassing 4,000 airports and 30 million flights a year, carrying 2.5 billion passengers.
With that information, he can bet-ter predict the likelihood of where a single case of bird flu in Asia, for in-stance, might eventually surface on other continents.
It is powerful data, but made even more so when placed in BioMosaic alongside a mapping tool that tracks on-the-ground disease reports. That part of the puzzle is HealthMap, which was created by a team at Boston Chil-dren’s Hospital under the direction of John Brownstein, a professor at Har-vard Medical School.
His staff monitors everything from Arabic news reports on cholera to a local television story about a ra-bid bat in Ohio. Each report is tagged and placed on a publicly available map that offers a global snapshot of infectious disease.
HealthMap employs translators who read articles and social media mentions in 15 different languages. Recently they found the medical re-cord of a patient with the avian flu vi-rus H7N9 on the Chinese social media site Weibo.
“It was the most striking thing,” Dr. Brownstein said. “If you think about the difference between that and SARS, we’re in a whole new world now.”
While BioMosaic is helping public health officials see rising threats more clearly, the holy grail for this kind of technology would be the ability to ac-tually to predict an outbreak before it begins, Dr. Brownstein said. But still there are limits.
“Information will only get us so far,” said Dr. Khan, whose personal experience has made him aware that equally pernicious forces, such as pol-itics, nationalism, strained resources and fear, can, in a crisis, override even the best data tools.
Copyright © 2013 by The New York Times Company. Reprinted with permission.
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Tick observances
Lyme cases
Hiking Trails
Vegetation
Temperature
Precipitation
Spatiotemporal Data Integration
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Anticipating the International Spread of Zika
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Anticipating the International Spread of Zika
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Bogoch I.B. et al. Lancet 2016; 387(10016): 335-6
Anticipating the International Spread of Zika
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• The 2017/18 influenza season broadly impacted life and health insurance sectors
• Could a severe influenza season be better anticipated?
• Could actions be taken in advance to mitigate its impacts?
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• Investigate utility of key indicators as an “early warning” for high influenza mortality season in the U.S.
• Model fit to historical all-cause mortality data in US general population >65 years of age
• Serfling model used to estimate excess mortality over 15 seasons (1999/2000 to 2013/2014 seasons)
• Predictors of excess mortality generated at different times of year: June, September, and November
• Model provides a framework for synthesizing multiple indicators and estimating excess mortality as influenza season progresses
Influenza Mortality Model
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Vaccine match, wks. 40-48
H1H3
B
Vaccine match, summer
H1H3
B
Percent of tests positive for flu
JuneSep.
Nov.
Dominant circulating type
Influenza Mortality Model
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• Indicators from as early as June can offer clues of an upcoming high mortality influenza season in the U.S.
• Key predictors of high mortality
• High influenza test positivity (each 1% increase in June associated with 3% increase in excess mortality)
• H3 dominance in June (compared with non-H3 dominance) increases excess mortality by 52%, in September by 66%, in November by 130%
• Vaccine match (if >90% of circulating isolates in November match vaccine strains, excess mortality decreases by 45%)
Model Findings
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https://www.rgare.com/knowledge-center/articles/seasonal-influenza-and-mortality
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What would you do if you knew of a significant risk to human health?
Six monthsinto the future
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ASSESS RESPONDDETECT
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Governments Healthcare PublicBusinesses
Empower
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Empowering governments to make smarter and faster decisions
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Empowering businesses with contextualized insights to mitigate risk
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Organizational Risk Individual Risk
LocalizePersonalize
Crowd Source*
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Lassa Fever
Outbreak in Grand
Bassa County, Liberia
Lassa Fever Outbreak in Liberia
Zebra
Real-time infectious disease alerts to keep you updated.
ZEBRA BETA
MEDIUM PRIORITY
REASON FOR EVENT
DISEASE
INSIGHTS ALERTS
Insights Alerts
Acute Flaccid
Myelitis
in Minnesota
Acute Flaccid Myelitis
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Creating more astute clinicians around the world
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April 9th, 2019
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Automated Location Specific Risk
Airport
Global Infectious Disease Event
Airport
Airport
Airport
GIS Analytics
Global Air Travel Analytics
100 km
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unaware of threat
Spreading Knowledge Faster than Disease
Infectious Disease Threat
Chief Risk Officer
Real-time insights pushed to the chief risk officer
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Provider Policyholder
Early Warning of Risk
Localized Personalized
Push Notifications
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– The Talmud –
“…whoever saves a single life, it is considered as if they have saved the entire world…”
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Empowering individuals anywhere in the world with personalized insights
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What would you do if you knew of a significant risk to human health?
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Organizational Risk Management
• Mapping geographic location and type of risk to geographic distribution and type of exposure
• Managing capital and/or diversifying risk for existing
underwritten policies
• Informed pricing and underwriting for new policies
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• Localized and personalized insights to policyholders • Opportunity to protect health and prevent/defer claims
Policyholder Risk Management