World Delta Variant’s Spread Prompts Reconsideration of Mask Guidance June 29, 2021June 30, 2021Roni Caryn Rabin, Apoorva Mandavilli and Shawn HublerComments Off on Delta Variant’s Spread Prompts Reconsideration of Mask Guidance Los Angeles County and the W.H.O. warned that even immunized people should wear masks indoors. Some scientists agreed, but urged a localized approach.
