At 04:09 06/03/2020, Thomas Cox wrote:
>OK, I decided to go take a look at how the JHU data is collected and
>here is their quickie summary. As suspected, they incorporate WHO
>data, but go further in case identification, albeit still with
>efforts to confirm cases. Here is the description: ....
Thanks (I've been rather tied up with work, so have been quiet for a bit).
I imagine that they probably have more detailed information about the
methodology, so I'll see if I can find and study that.
>" Our primary data source is DXY, an online platform run by members
>of the Chinese medical community .... we found DXY cumulative case
>counts to frequently lag other sources; we therefore manually update
>these case numbers throughout the day when new cases are identified.
>To identify new cases, we monitor various twitter feeds, online news
>services, and direct communication sent through the dashboard. .... "
There are clearly things that I need to learn since, as I have
implied, I would have thought that, for most countries, there would
be only one primary source of data (some sort of 'official figures'),
so I'm not clear as to what the 'other sources' are.
We also need to understand how they can "manually update these case
numbers throughout the day when new cases are identified". Given
that I presume that none of the sources contain any patient
identifiers, on the face of it I cannot see how they can ascertain
whether or not "new cases" that they think they have identified were,
or were not, already included in the figures they are 'updating' -
which would seem to carry a significant risk of 'double counting' some cases.
I'll see what I can discover!
Kind Regards,
John
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