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The second step is to download any available existing subsets that are associated with your required data elements.

The international SNOMED CT COVID-19 subsets are made available via SNOMED International's Reference set and translation tool - https://refset.ihtsdotools.org/.These subsets have been placed in the 'COVID-19 subsets' project and are named according to the naming convention presented below. For further guidance on how to download the subsets, please see 1.2 How to Download the example COVID-19 subsets in this guide can be downloaded from Appendix A - Example Subsets.

Subset Naming Convention

The international example COVID-19 subsets provided by SNOMED International have been named using the following convention.

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The international SNOMED CT subsets have been organized into a number of categories, based on groupings of data elements that are likely to be recorded together. The six five categories identified are:

• Provider and Facility Details (PRF)

• Patient Demographics (PAT)

• Clinical Assessment (ASS)

• Tests and Investigations (INV)

• Prevention, Treatment, and Education (PTE)Other Covid-19 Related Data (OCD)

Please follow the links above for information on the specific subsets within each category.

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In response to an immediate need for COVID-19-specific concepts, various Member countries have developed concepts within their national SNOMED CT Extensions. Some of these extension concepts are documented in this guide, for the interest of other Members. Please note, however, that extension concepts should only be used when the module in which they are published is included in the implemented SNOMED CT Edition. SNOMED CT extension concepts are not included in the subsets downloadable from the Reference Set tool.

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