Four years ago this week, the U.S. shut down in response to the Covid-19 pandemic. While officials were adamant that lockdowns, masks, and later vaccines were essential for all Americans to limit the damage from the spread, it's become increasingly clear that the science behind so many of the mandates was decidedly shaky. Yet those who warned at the time of the risks of draconian actions were widely denounced and even silenced. On this episode of the Free Expression podcast, Professor Martin Kulldorff, one of the most prominent skeptics tells Gerry Baker why he says he was fired as professor of medicine at Harvard University for his views, why the research on vaccines is not so 'black and white,' and why the media and society were so hostile to alternative views on masks, school closures and natural immunity. Learn more about your ad choices. Visit megaphone.fm/adchoices