There should be a page history with a comment describing why changes were made. The latest revision can describe the current best knowledge “without fluff”, and the revision history can show why and how the content changed over time.

The CDC already has a list of when updates were made to all the pages, but AFAICT it doesn’t say what changed or why.

https://www.cdc.gov/coronavirus/2019-ncov/whats-new-all.html