“It’s hard to answer that question definitively, I think,” said Glen Mays, the chair and a professor in the Department of Health Systems, Management & Policy in the Colorado School of Public Health at CU Anschutz. He said the drawings were novel and helped promote awareness and excitement about the vaccinations but they came after many early adopters already had gotten their shots. So it’s “really difficult to know exactly what, if any, boost it’s had.” It seems likely that the drawings, at the very least, arrested, then slowed, a significant slide in consumer interest in getting the vaccine.