A new investigation has found that teachers were central to COVID-19 transmission in elementary schools. … The CDC investigation took place in Cobb County, Georgia, where nine COVID-19 outbreaks occurred at six elementary schools between December 1, 2020, and January 22, 2021. … At least two of the infection clusters began with educator-to-educator spread and continued as teachers exposed students to the virus, the report found. Teachers tested positive in all but one of the clusters.