And—this is @alexismadrigal and @kissane—we have to thank CTP’s contributors. This project came out of nothing. You became its blood and bones. We know how much you sacrifice...

In the beginning of the pandemic, @edyong209 told us that natural disasters bring people together, but pandemics tear people apart. We like to think that CTP was an active protest ...

Our project's key value is a culture of gratitude, saying thank you even for things that are a normal part of the job. In this year where so much has come at all of us, it has help...

We couldn’t have done this work for an entire year without being able to give stipends to some of the people who worked on it full-time. Thanks to our funders—and the folks who...

And we want to thank our advisory board members, too, who brought necessary domain expertise and helped us through some very hard decisions. @areshasays, @erictopol, @gillianbwhite...

Second, thank you to the health department officials who gathered up the data that we compile. We know that we are merely the last step that this data takes. What you all have done...

We have many thank yous. First, to the frontline healthcare workers, who risked their lives to treat this emerging disease.

Our data collection ends today, but the CTP will continue publishing accountability work. We want to use our knowledge of the nation's data to show how we might fix the structural ...

It's impossible to take in the sweep of the pandemic. But on this day last year, fewer than 20 people were known to have died from COVID-19 in the US. There were only 574 cases. No...

Deaths have tracked the other metrics, at a delay, as they have through the pandemic. This is the first day we've seen fewer than 1000 deaths reported since November 29, more than ...

Hospitalizations have also fallen from highs over 130 thousand down to just over 40 thousand today. https://t.co/w1odHP3fPU

We ended up tracking other metrics. Cases reached heights we never could have imagined in the early days. The 7-day average got to 250 thousand cases per day in early January. Toda...

The project was initially created to track testing. The first few days, states reported just a few thousand total tests. Today, states reported 1.2 million tests. The single-day hi...

Our daily update is published. States reported 1.2 million tests, 41k cases, 40,212 hospitalized COVID-19 patients, and 839 deaths. This is our final day of data collection after a...

The number of people in the hospital with COVID-19 continues to decline in every US region. The Midwest and West are now both under 100 COVID-19 hospitalizations per million people...

A Sunday-to-Saturday view of the data makes the storm-related reporting dip and rise of the previous two weeks of test, case, and death data particularly clear. More about that in ...

Our daily update is published. States reported 1.4M COVID-19 tests, 60k cases, 41,401 people currently hospitalized, and 1,674 deaths. https://t.co/4dicgp6Pm4

More broadly, we are so grateful to the health officials who have worked inhuman hours for more than a year to collect and publish the best data they could, despite our nation’s ...

In all, we managed to switch 45 of 56 US jurisdictions to explicit totals in totalTestResults. And 54 jurisdictions now post at least current (if not historical) data in units of t...

Switching each state’s totalTestResults from calculated to explicit numbers required getting complete historical testing data from states. We tried to get the data in units of te...

These changes close the book on work we began in August 2020 to improve the data in totalTestResults. When our project began, most states shared positive and negative results only,...

In the last of our rolling updates to our totalTestResults API field before we end data collection tomorrow, we switched totalTestResults for MT, NM, and WV from summing positive+n...

We have spent these last few weeks documenting the federal sources of COVID-19 data and explaining how to best navigate them. If you're looking to keep an eye on pandemic data afte...

Our daily deaths is impacted by a change in Ohio's death reporting. The state is now only reporting COVID-19 deaths twice a week as they receive verified death certificates from th...

7-day average cases are down over 10% week over week in all US regions save the Northeast. However, testing in the Northeast is up much more than cases in the same period. https://...

Currently hospitalized is under 50 per million people in 8 states, up from only 2 states in early February. https://t.co/Fohc3acyMF

Our daily update is published. States reported 1.7M tests, 69k cases, 42,541 currently hospitalized, and 2,221 deaths. This is our final weekday update. We'll tweet our last daily...

As you use or build on our work, keep in mind the annotations aren’t perfect. But we decided that providing a comprehensive look at our annotations was more important than releas...

Tracking state definitions has been vital to interpreting the data they publish. We hope that this full view of our annotations will be of use to researchers and data users aiming ...

Definitions are often relegated to small footnotes on state dashboards. But they make a big difference in the data: They can tip the scale between labeling a COVID-19 case as activ...

Health data pipelines in the US are siloed, with each state running its own pipelines to collect data on COVID-19’s spread. In the absence of federal guidelines, and constrained ...

The COVID Tracking Project is ending data collection this Sunday. As part of our wind down process, we are for the first time publishing our full data annotations, a set of structu...

Check out the 101 for tips on how to navigate these problems in the federal testing dataset—including some workarounds—and what we hope the federal government will do to addres...

Thankfully, federal testing data is standardized, unlike our patchwork testing dataset. But the data can be incomplete—especially in 5 states that still can’t submit data to th...

Unlike case, death, and hospitalization data, federal testing data doesn’t match well to the state data we collect. The discrepancies point to problems with both state and federa...

Since The COVID Tracking Project is winding down on March 7, we’re packaging up what we’ve learned about federal COVID-19 data in a 101 series. Up today: federal testing data. ...

These switches are part of our general improvements to the totalTestResults API field. As we approach our final day of data collection on March 7, we will continue to improve our d...

The changes in ME dropped totalTestResults by around 40k. The changes in IL made no impact to the value of totalTestResults at the topline but may have shifted earlier values.

To get more testing history, we changed ME’s testing data source to one that counts residents only instead of residents and nonresidents. ME’s other COVID-19 data only counts r...

These switches caused the totalTestResults field to increase by ~325k (cumulatively). The increases were driven by MI and SD, because our old totalTestResults counted MI positives ...