During the COVID-19 pandemic, politicians, scientists and media organizations vilified unvaccinated people, blaming them for prolonging the pandemic and advocating policies that barred “the unvaccinated” from public venues, businesses and their own workplaces. But a peer-reviewed study published last week in Cureus shows that a key April 2022 study by Fisman et al. — used to justify draconian policies segregating the unvaccinated — was based on the application of flawed mathematical risk models that offer no scientific backing for such policies. Dr. David Fisman, a University of Toronto epidemiologist was the lead author of the April 2022 study, published in...