BFR said:
https://www.nytimes.com/2022/01/14/health/cloth-masks-covid-cdc.html The CDC Is Finally Acknowledging That N95 Respirators Work Better Than Cloth Masks"The Centers for Disease Control and Prevention (CDC), whose previous advice about face coverings as a safeguard against COVID-19 paid little attention to large differences in the effectiveness of different mask types, recently revised its guidance to acknowledge that N95 respirators work better than reusable cloth masks or disposable surgical masks. As with earlier changes in CDC guidance, it is not exactly clear why the agency waited so long to highlight useful information about COVID-19, although the spread of the highly transmissible omicron variant may have something to do with it." |
"Work better" ≠ only.
It was always known that N95 masks "work better". You claimed that the CDC said they only worked, which is not the case here.