The director of the Centers for Disease Control and Prevention (CDC) on Feb. 8 defended her agency’s promotion of masking after a new study found masking had little effect on the spread of respiratory viruses like COVID-19.
The Cochrane review analyzed randomized controlled studies, considered the gold standard by U.S. officials and others, but limitations undermined the conclusions, Dr. Rochelle Walensky claimed.
“One of the limitations of that study, in addition to the fact that it included randomized trials from before COVID-19, is that it stated in the study that people actually had limited update of using masks,” Walensky, the CDC director, said during a hearing in Washington. “Of course, randomized trials that look at mask use by people who aren’t wearing them are going to have limited utility.”…