From your favorite fake news outlet, Fox and Bitch Baier:
The World Health Organization said it is monitoring another new COVID-19 variant with mutations that the agency fears could make it resistant to vaccines.
The Mu variant, also known as B.1.621, was added as a "variant of interest" to the organization’s watchlist Monday.
This was on the UK’s list “as of Aug. 16,” as a Variant Under Investigation, but it had not yet been assigned “Mu.”
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1012644/Technical_Briefing_21.pdf