Daily Covid-19 Cases

This page is for the data nerds like me who want a simple way to keep track of the reported new cases of the covid-19 coronavirus in the United States. Data are from the European CDC and are reported at midnight central European time each day.


How ECDC collects and processes COVID-19 data

Since the beginning of the coronavirus pandemic, ECDC’s Epidemic Intelligence team has been collecting the number of COVID-19 cases and deaths, based on reports from health authorities worldwide. This comprehensive and systematic process is carried out on a daily basis. To insure the accuracy and reliability of the data, this process is being constantly refined. This helps to monitor and interpret the dynamics of the COVID-19 pandemic not only in the European Union (EU), the European Economic Area (EEA), but also worldwide.

Every day between 6.00 and 10.00 CET, a team of epidemiologists screens up to 500 relevant sources to collect the latest figures. The data screening is followed by ECDC’s standard epidemic intelligence process for which every single data entry is validated and documented in an ECDC database. An extract of this database, complete with up-to-date figures and data visualisations, is then shared on the ECDC website, ensuring a maximum level of transparency.

ECDC receives regular updates from EU/EEA countries through the Early Warning and Response System (EWRS), The European Surveillance System (TESSy), the World Health Organization (WHO) and email exchanges with other international stakeholders. This information is complemented by screening up to 500 sources every day to collect COVID-19 figures from 196 countries. This includes websites of ministries of health (43% of the total number of sources), websites of public health institutes (9%), websites from other national authorities (ministries of social services and welfare, governments, prime minister cabinets, cabinets of ministries, websites on health statistics and official response teams) (6%), WHO websites and WHO situation reports (2%), and official dashboards and interactive maps from national and international institutions (10%). In addition, ECDC screens social media accounts maintained by national authorities, for example Twitter, Facebook, YouTube or Telegram accounts run by ministries of health (28%) and other official sources (e.g. official media outlets) (2%). Several media and social media sources are screened to gather additional information which can be validated with the official sources previously mentioned. Only cases and deaths reported by the national and regional competent authorities from the countries and territories listed are aggregated in our database.


  • Thomas Pyzdek April 23, 2020 at 3:19 pm Reply

    I’d been wondering about the plateau, but today’s drop was breathtaking! Makes me wonder about case reporting.

  • Thomas Pyzdek April 26, 2020 at 6:33 am Reply

    April 26th confirms it: the case count is not real. Nature does not jump. These huge swings have to be man made. I don’t know at this time just what’s going on, but something is definitely going on.

    An artifact of how “case” is defined? A reporting lag? New testing or new testing methods? New definition of what’s a case of covid-19? States getting caught up on their reporting backlog? Watch the news.

  • Thomas Pyzdek April 30, 2020 at 7:39 am Reply

    Starting April 30 I elected to also show data for my home state of Arizona. Sadly, yesterday our Governor Doug Ducey extended the lock-down until May 15, with some exceptions. The trends look great so, hopefully, May 15 will be the end of the lock-down. People are hurting, with luck they’ll be able to keep going until then.

  • Thomas Pyzdek May 5, 2020 at 10:28 am Reply

    This will be my last daily posting of the covid-19 cases and deaths. The data simply are not useful for tracking the actual pandemic numbers. There is too much money and politics involved and the “data rules” change on almost a daily basis. How cases are defined and even how deaths are defined keep changing. From time-to-time people go back through the reports and update the data to reflect the new definitions.
    Perhaps years from now we will get numbers we can rely on and maybe even a book describing what really happened. For now, as an industrial statistician, I am simply too naive to play in this arena!

  • Thomas Pyzdek May 11, 2020 at 9:36 am Reply

    Dr. Deborah BirxUpdate May 11, 2020. From Business Insider. The White House coronavirus task force response coordinator, Dr. Deborah Birx, said in a recent meeting that “there is nothing from the CDC that I can trust,” The Washington Post reported. Birx and others reportedly feared that the Centers for Disease Control and Prevention was using inflated data on coronavirus death and case rates. I guess it’s not just me! On a more serious note, how can our leaders respond to this pandemic without trustworthy data?


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