St. Louis and St. Louis County will reimpose their mask mandate for residents in indoor public places and on transportation as part of an attempt to reduce the spread of the Lineage B.1.617 Delta variant. The order will be in effect on July 26. (The Hill) COVID-19 pandemic in MissouriCOVID-19 pandemic in the United StatesCOVID-19 pandemic in North AmericaCOVID-19 pandemic link embed save