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Amid the Delta variant summer surge in COVID-19 cases, hospitalizations and deaths, some experts warned that the next potential threat was starting to emerge: the SARS-CoV-2 Mu variant.

Mu made headlines because its specific mutation meant it could evade vaccine immunity—spiking a new fear among the immunized.

But then an interesting thing happened—the prevalence of Mu in circulation in the US dropped off quickly over a matter of weeks. Head over to Medscape to read the full story.