These Virginia counties fall under updated CDC mask guidance The adjusted guidance states that people should wear masks in indoor public spaces in communities with substantial or high transmission rates. The CDC said that new data about the delta variant is what is behind the change in recommendations. and last updated 2021-07-27 18:33:32-04 RICHMOND, Va. -- On Tuesday, the CDC updated their mask recommendations in areas that are considered high risk. How will this new guidance affect your day-to-day life? The adjusted guidance states that people should wear masks in indoor public spaces in communities with substantial or high transmission rates. The CDC said that new data about the delta variant is what is behind the change in recommendations.