An examination of the consequences of vaccine hesitancy and denial. It's a war anti-vax activists have been fighting for a decade. And COVID-19 is what they practiced for: A national conversation about vaccine safety.

A Perilous Quest to Save the World’s Children tells the inspiring story of Dr. Maurice R. Hilleman, a man with a singular, unwavering focus — to eliminate the diseases of children. From his poverty-stricken youth on the plains of Montana, he came to prevent pandemic flu, develop the measles-mumps-rubella (MMR) vaccine, and invent the first-ever vaccine against human cancer.