Occasionally, the WWC may re-review a study that has been previously reviewed. For example, when the WWC updates a report, studies in the report are re-reviewed using the latest standards.
Just as the new version of the report is posted and the previous version is archived, the data from the new reviews are made available for download and data from the previous reviews are archived.
Beginning in November 2016, data from archived reviews are available for download below. The WWC provides this archived data as part of our open data approach to increase transparency.