Millions upon millions of U.S. children have been fully masked up at school this year after the Centers for Disease Control and Prevention cited, in part, a study out of Arizona that appeared to demonstrate the need for, and effectiveness of, masking among schoolchildren.
Yet, at least according to multiple experts, that study should not have been cited as evidence in favor of universal masking:
EXPERTS: the CDC study on masks was “so unreliable that it probably should not have been entered into the public discourse”
A multi-month investigation into a flawed study, and a public health agency's lack of transparency
— David Zweig (@davidzweig) December 16, 2021