A 2018 video of public health professional Laurie Garrett resurfaced on May 9 via Twitter showing that health experts were well aware of the ineffectiveness of masks before the Covid outbreak. Despite this knowledge, masks only recently began disappearing. People can now enter grocery stores and fly on planes without their faces half-hidden, after two years of mass mandates and massive public pressure to comply with them.
In the clip, Garrett, author of The Coming Plague: Newly Emerging Diseases in a World Out of Balance, announces to the National Academy of Medicine that a large-scale study conducted in Japan found that masks do not help defend against viruses such as the 2009 influenza. Instead, the main advantage of masks is to cause frightened behavior.