A Cdc Study News Today

Significant change in the cases. >> reporter: a c.d.c. study published last week showed schools without mask mandates are three and a half times more likely to have outbreaks. >> my worst fear did become reality. >> bye, guys. >> reporter: tini krismans two sons go to eastside elementary. three weeks after the major outbreak -- >> it was a third grader who showed symptoms and both tested positive on the same day. >> reporter: then she tested positive. many teachers and staff also worry, especial...