The study quoted there did not say masks don't work. The brainwashed antivaxxers are off on another weird propaganda campaign.
The big flaw? Most of the studies don't address COVID, and in the cases they address, masks were only worn briefly. The two studies that were done after the start of COVID showed that masks helped.
A respected science organization says its review of studies about respiratory viruses was misinterpreted to incorrectly claim masks were useless.
www.nytimes.com
The CDC has a better summary of the research.
CDC provides credible COVID-19 health information to the U.S.
www.cdc.gov