The masks were likely known not to be effective, but were touted as a preventative anyway. The politicians then used these mask directives as part of their COVID tyranny…a visible sign of a loyal subject. Despite these studies and the waning of the virus you will see the brainwashed still wearing these masks even outdoors and alone in their cars as a talisman little different than wearing magic juju beads or acifidity bags.
Sadly, based on past performance, my capacity to believe anything touted by the government or media is completely shot.
And because the CDC and media are now saying the masks were useless, I have to wonder at what the "real" agenda is for releasing this news now.