03/24/21: The problem with the idea of COVID herd immunity

Even if 70 percent of the population was vaccinated, it may not be enough to stop the spread of the virus because of the emergence of new variants. Reporter Stephanie Goldberg joins host Amy Guth to explain. Plus: A North Side private practice tapped to vaccinate CPS staff gets its doses taken away, new city rules would prevent employers from retaliating against workers getting vaccines, Tribune Publishing’s board favors Alden's bid over higher offer from a Maryland hotel tycoon and a downtown alderman seeks a Thompson Center zoning change to tee up potential sale.