The state's Department of Education disputed the union's findings, while sharing its own figures that suggest a moderate vacancy increase.
It was not immediately known if either teacher in the Connally Independent School District was vaccinated.
Twenty-six people were ultimately infected with the coronavirus, including 12 of her 24 elementary school students, the CDC reported.
Children now make up more than 35% of reported COVID-19 cases in Tennessee as pediatric hospitalizations surge in the U.S.
"Do not fight mask wars in our schools," the school district superintendent said.
“I could hear rats running around in the walls and ceiling. It’s disgusting," one teacher said.
AFT President Randi Weingarten explains why she now supports vaccine mandates -- and why her union has opposed them.
The new guidance is intended "to allow flexibility at the local level," the Centers for Disease Control and Prevention said.
Republicans are pushing laws to prevent teaching about systemic racism and white privilege in schools. Teachers say they just want to teach the truth.
"It would take at least another dozen apologies to other students before I’d be able to decipher the reaction [my student] gave me that day."