COVID-19 is an emerging, rapidly evolving situation.
Get the latest public health information from CDC:

Get the latest research information from NIH:
Search Areas (BETA)
If you are looking for information about clinical studies, please visit

Search Areas

The Search Areas documentation (in XML and JSON formats) describes the parts of a study record that can be searched for content. Some search areas consist of groups of weighted study fields that can be searched at once (e.g., BasicSearch area consists of 58 application programming interface (API) fields). Search areas can also consist of a single API field (e.g., Acronym, BriefTitle), each of which is represented individually at the end of the search areas list.

See the discussions of search operators and search expressions and syntax for more information on using search areas when conducting searches.

This page last reviewed in June 2019