WOMO-United States

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Mortality is a basic indicator of health. Understanding its evolution is fundamental for effective public health planning and action. Mortality monitoring is pivotal during influenza or other pandemics, as it provides a robust way to monitor progression and public health impacts when other systems are failing. The tools below are developed by the World Infectious Disease Monitoring Foundation and are part of our key objective to develop an Early Warning System for infectious diseases.

The weekly Z-scores indicate how far mortality diverges from the baseline:

  • Low excesses are between 1 and 4.
  • Moderate to high between 4 and 10.
  • Very high between 10 and 15.
  • Above 15 excess mortality is considered extremely high.

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We are urgently looking for 800 usd to cover the hosting costs of this project for one year. If you are visiting this page, please consider donating something.

Help us build the Early Warning System we should have had for COVID.


  • Data source: provisional vital statistics data from the National Center for Vital Statistics at the Centers for Disease Control and Prevention (CDC).
  • Limitations: it can take two to three weeks for all natural cause deaths to appear within the vital statistics system. The regions marked red have a higher uncertainty.
  • Sharing: images from our tools can be shared when quoting the source, and online by linking to our website below the image.

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With your help we can bring modern diagnostics to humanitarian aid, track disease outbreaks better and prevent future pandemics.

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