Disease Outbreak Monitoring  on the Web Clark Freifeld Research Software Developer Harvard Medical School  Children’s Hosp...
www.healthmap.org
 
HealthMap Article Processing Acquisition >20,000 sites  Every hour; 24/7 Clustering Text Matching  Similarity Score   Cate...
Multi-Stream Alarming: Heat Index <ul><li>Meta-alert composite score, based on </li></ul><ul><ul><li>Number of sources pro...
Limitations of English-language <ul><li>Alerts by country </li></ul><ul><ul><li>1-USA: 4351 </li></ul></ul><ul><ul><li>2-U...
English
Spanish
French
Russian
Case Study: Legionnaire’s in Spain  June 30th Google (ES) Alert Alert #1 July 2nd ProMED-mail Alert Alert #2 July 4th Goog...
Early Stats <ul><li>> 200 alerts per day </li></ul><ul><li>80,000 alerts so far </li></ul><ul><li>Alerts in 201 countries ...
Usage <ul><li>500-600 visits per day </li></ul><ul><li>100,000 unique visitors since 9/06 launch  </li></ul><ul><li>Top vi...
Public Health Resource
Various implementations International Society for Infectious Disease Liberty Science Museum, NYC HHS Command Center
Tool for general population
Future Directions <ul><li>Improve existing filtering algorithms </li></ul><ul><li>More sensitive, noisy sources </li></ul>...
Acknowledgments <ul><li>Children’s Hospital Informatics Program </li></ul><ul><li>@ Harvard-MIT HST </li></ul><ul><li>John...
Contact <ul><li>[email_address] </li></ul><ul><li>www.healthmap.org </li></ul><ul><li>www.chip.org </li></ul>
Upcoming SlideShare
Loading in …5
×

09 Clark Freifeld -- igbos j_

959 views
916 views

Published on

HealthMap: Automated disease outbreak monitoring

Published in: Technology, Health & Medicine
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
959
On SlideShare
0
From Embeds
0
Number of Embeds
13
Actions
Shares
0
Downloads
7
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide
  • Surveillance sans frontières: Internet-based emerging infectious disease intelligence
  • 09 Clark Freifeld -- igbos j_

    1. 1. Disease Outbreak Monitoring on the Web Clark Freifeld Research Software Developer Harvard Medical School Children’s Hospital Informatics Program
    2. 2. www.healthmap.org
    3. 4. HealthMap Article Processing Acquisition >20,000 sites Every hour; 24/7 Clustering Text Matching Similarity Score Categorization 1700 disease patterns 5000 location patterns Bayesian Filtering 6 million phrases 91% accuracy
    4. 5. Multi-Stream Alarming: Heat Index <ul><li>Meta-alert composite score, based on </li></ul><ul><ul><li>Number of sources providing information at a particular location </li></ul></ul><ul><ul><li>Recentness of alert </li></ul></ul><ul><li>Marker algorithm </li></ul><ul><ul><li>Exponentially weighted alerts </li></ul></ul><ul><ul><li>Increase heat (redness) for more recent event and higher impact </li></ul></ul>low high Freifeld et al. J Am Med Informatics Assn. 2008.
    5. 6. Limitations of English-language <ul><li>Alerts by country </li></ul><ul><ul><li>1-USA: 4351 </li></ul></ul><ul><ul><li>2-UK: 1018 </li></ul></ul><ul><ul><li>3-Canada: 880 </li></ul></ul><ul><ul><li>4-China:737 </li></ul></ul>
    6. 7. English
    7. 8. Spanish
    8. 9. French
    9. 10. Russian
    10. 11. Case Study: Legionnaire’s in Spain June 30th Google (ES) Alert Alert #1 July 2nd ProMED-mail Alert Alert #2 July 4th Google (EN) Alert Alert #3
    11. 12. Early Stats <ul><li>> 200 alerts per day </li></ul><ul><li>80,000 alerts so far </li></ul><ul><li>Alerts in 201 countries </li></ul><ul><li>175 disease categories </li></ul><ul><li>4 four languages </li></ul><ul><ul><li>English (60%) </li></ul></ul><ul><ul><li>Spanish (20%) </li></ul></ul><ul><ul><li>French (11%) </li></ul></ul><ul><ul><li>Russian (9%) </li></ul></ul>
    12. 13. Usage <ul><li>500-600 visits per day </li></ul><ul><li>100,000 unique visitors since 9/06 launch </li></ul><ul><li>Top visitors: </li></ul><ul><ul><li>cdc.gov </li></ul></ul><ul><ul><li>dhs.gov </li></ul></ul><ul><ul><li>med.navy.mil, af.mil </li></ul></ul><ul><ul><li>state.fl.us </li></ul></ul><ul><ul><li>state.id.us </li></ul></ul>
    13. 14. Public Health Resource
    14. 15. Various implementations International Society for Infectious Disease Liberty Science Museum, NYC HHS Command Center
    15. 16. Tool for general population
    16. 17. Future Directions <ul><li>Improve existing filtering algorithms </li></ul><ul><li>More sensitive, noisy sources </li></ul><ul><li>More filters: number of cases, species affected </li></ul><ul><li>More languages </li></ul><ul><li>Collaborative networks </li></ul><ul><li>Other areas: </li></ul><ul><ul><li>Environmental health </li></ul></ul><ul><ul><li>Chronic disease </li></ul></ul><ul><ul><li>Violence, conflict zones </li></ul></ul><ul><ul><li>Pharmaceuticals </li></ul></ul><ul><li>Your ideas </li></ul>
    17. 18. Acknowledgments <ul><li>Children’s Hospital Informatics Program </li></ul><ul><li>@ Harvard-MIT HST </li></ul><ul><li>John Brownstein, PhD </li></ul><ul><li>Ken Mandl, MD MPH </li></ul><ul><li>Ben Reis, PhD </li></ul><ul><li>Mikaela Keller, PhD </li></ul><ul><li>Isaac Kohane, MD PhD </li></ul><ul><li>Carlo Venis (Wabash) </li></ul><ul><li>Roger Araujo (Peru NMRCD) </li></ul><ul><li>David Blazes (Peru NMRCD) </li></ul><ul><li>Aranka Anema (UBC) </li></ul><ul><li>Larry Madoff (ProMED) </li></ul><ul><li>Funding </li></ul><ul><li>Google Foundation </li></ul><ul><li>National Library of Medicine (NLM) </li></ul><ul><li>Centers for Disease Control and Prevention </li></ul><ul><li>Canadian Institutes of Health Research (CIHR) </li></ul>
    18. 19. Contact <ul><li>[email_address] </li></ul><ul><li>www.healthmap.org </li></ul><ul><li>www.chip.org </li></ul>

    ×