New science has again prompted the Centers for Disease Control and Prevention to update its mask guidelines. The CDC recommended on Tuesday that fully vaccinated people wear masks in public indoor settings "in areas with substantial and high transmission." That includes a large swath of the US right now, including the vast majority of counties in the South...
The CDC said in May that vaccinated people don't need masks, a recommendation based partly on data indicating that vaccinated people were less likely to transmit the virus to others. But the Delta variant - now the dominant strain in the US - behaves differently than previous versions of the virus, Walensky said.
More evidence that the best informed still don't know their derriere from a hole in the ground.
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