The first epidemics -- Warm Springs -- "Cripples' money" -- "And they shall walk" -- Poster children, marching mothers -- The apprenticeship of Jonas Salk -- Pathway to a vaccine -- The starting line -- Seeing beyond the microscope -- "Plague season" -- The rivals -- "The biggest public health experiment ever" -- The Cutter fiasco -- Mission to Moscow -- Sabin Sundays -- Celebrities and survivors.