Consider adding COVIDcast support for HHS regions

[krivard]

Currently, data ingestion accepts the following geographical types:

• county
• hrr
• msa
• dma
• state

We currently have an indicator waiting in the wings whose ideal geographical type is HHS region. To begin serving it from the API, ingestion needs to know how to validate HHS region ids.

Further reading:

• Health & Human Services Regions
• Coordinate with HHS support in the geo mapper

[dfarrow0]

Lots of the flu work involves HHS and Census regions. See https://github.com/cmu-delphi/utils/blob/main/src/geo/locations.py

Regions are nice to work with because they're just sets of states. If you have a signal at the state level, it's trivial to aggregate it up to the HHS or Census level.

The epidata API defines the following region ids: https://github.com/cmu-delphi/delphi-epidata/blob/main/labels/regions.txt

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@krivard is this issue the only thing blocking the covidnet source?

[krivard]

If you have a signal at the state level, it's trivial to aggregate it up to the HHS or Census level.

Just to clarify, aggregation does not happen in this codebase; this ticket is solely about supporting HHS region ids during COVIDcast acquisition and adding associated tests.

@dfarrow0 No; I've written up the remaining COVIDnet work in a new issue to avoid confusion with the other CDC hospital data.

[dshemetov]

@krivard just ran across this issue. GeoMapper supports state_code -> hhs_region_number mappings now.

[sgratzl]

can we close this?

[krivard]

Yep; fixed in #314