[theold]

The documents appear to be talking points for CDC staff to use in explaining the dangers of the delta variant and “breakthrough″ infections that can occur after vaccination. Noted under communications: "Acknowledge the war has changed."

https://abcnews.go.com/Health/wireStory/...dlines_hed

In recommending that vaccinated people resume wearing masks indoors in virus hot spots, the CDC this week said that new evidence shows that breakthrough infections may be as transmissible as those in unvaccinated people. 

They cited a large recent outbreak among vaccinated individuals in the Cape Cod town of Provincetown, Massachusetts, among others, for the change.