Throughout 2020, as the COVID-19 pandemic grew, health authorities looked for ways to contain the spread. One option was to introduce a mask policy, making it mandatory in public places. But that has not sat well with so-called anti-maskers. They refuse to comply, suggesting it is government overreach and an infringement on their personal liberties. That has led to some hostile exchanges, often putting frontline workers in the crosshairs of public anger. But the anti-mask phenomenon is not new. Anti-maskers existed during the Spanish Flu of 1919. So what is behind the anti-mask phenomenon?