SeroNet Terminology Files

The SeroNet (NCI Serological Sciences Network for COVID-19) terminology is a set of terms used to support COVID-19 serosurveillance studies. SeroNet is a collaboration with the National Institute of Allergy and Infectious Diseases (NIAID), other parts of the National Institutes of Health (NIH), the Department of Health and Human Services (HHS), and several other top biomedical research institutions to answer critical questions that will serve to optimize the ability to respond to the challenges of the COVID-19 pandemic as well as future public health concerns.

SeroNet files are available for download from the NCI EVS ftp site (  in excel spreadsheet format.

Files available for download:
SeroNet Terminology:
SeroNet Terminology  SeroNet Terminology in spreadsheet format.

Spreadsheet column headers:

Spreadsheet Column Content Description
Subset Code The NCIt Concept Code that is associated with the subset name.
Subset Name The preferred term of the table chosen by the SeroNet working group members. Concepts belonging to a particular list of terms are linked by the table.
NCIt Concept Code A unique, machine readable string that begins with a "C" and is followed by a series of digits; each concept in the NCIt has one concept code.
NCIt PT The preferred term chosen by NCIt staff; the most disambiguous term for a particular concept. Each concept has one NCIt PT.
NCIt SY Synonymous terms to the preferred term chosen by NCIt staff.
SeroNet PT The preferred term chosen by the SeroNet working group members.
SeroNet SY The synonym chosen by the SeroNet working group members.
NCIt Definition The meaning of a concept as defined by NCIt.
Has SeroNet Authorized Value Code The concept code(s) of the authorized value associated with this variable.
Has SeroNet Authorized Value PT The SeroNet preferred term of the authorized value(s) associated with this variable.
Row The identifier that will sort the rows into tables with authorized values beneath the shaded variable rows.


The database is reconciled the last Monday of every month; this is the database from which a production version is generated to correspond to the files posted on the ftp site. The files will be posted during the following two weeks. Additional terms may be suggested at the Term Suggestion page; please indicate SeroNet as the project.

Previous versions of the SeroNet Terminology files can be found on the following website

Help requests on these files should go to