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Event 201 - John Hopkins/Gates Foundation:

Updated 1 Apr: CBC: The flurry of daily pandemic data can be overwhelming. Here’s how to make sense of it
by Roberto Rocha
There’s no universal definition of a confirmed case
So, what makes a COVID-19 case official and part of the daily count? It depends on the country or region.
Some places define a confirmed case as one where a person was tested and the results were validated in a lab. Other jurisdictions consider a case confirmed if the patient exhibits all the major symptoms.

Sometimes, the definition of a confirmed case can change. Last week, Quebec changed how it counts new cases. Previously, a positive test at a hospital lab had to be validated at the Laboratoire de santé publique du Québec. The second step has been eliminated, clearing a backlog of pending results. This resulted in a big jump in new confirmed cases...

There has never been, in the history of humanity, so much data shared globally as a public health crisis unfolds. This is truly the first data-driven pandemic...

Take the dashboard by Johns Hopkins University, one of the first and most authoritative COVID-19 trackers. Its centrepiece is a world map showing cases by region. It has been shared widely to illustrate how bad the situation is in the U.S.
What it doesn’t say is that in the U.S., cases are reported by county or city, while most other countries report a single number, or, in some cases, provide a breakdown by state or province, as Canada does.
This makes it look like COVID-19 is far more widespread in the U.S. than in other countries...

Corrections
•A previous version of this story referred to the number of people who died out of all those infected with the virus as the mortality rate. In fact, that is the case fatality rate.
https://www.cbc.ca/news/health/covid-19-pandemic-data-primer-stats-charts-1.5513222

some may say it’s “the first data-driven pandemic”, BUT NONE OF THE DATA IS “REALIABLE” - Dr. John Ioannidis, epidemiologist, Stanford.