https://wccftech.com/rainbow-six-extraction-is-the-official-title-of-rainbow-six-quarantine/

After a lot of speculation, Ubisoft announced today that the official title of the game previously known as Rainbow Six Quarantine will be Rainbow Six Extraction.

The reason for the change is pretty obvious, seeing as the game was originally announced at E3 2019, way before the COVID-19 pandemic forced the global population to endure long quarantine periods in the past year and a half. During this time, the core of Rainbow Six Extraction has evolved, according to the developers.