The US is not the only country facing COVID-19 vaccine hesitation. Around the world, public health officials are grappling with this issue that has the potential to slow or even derail efforts to end the pandemic. Dr. Saad Omer, director of the Yale Institute for Global Health, talks with Stephanie Desmon about the spectrum of vaccine hesitancy, the promise of continuing medical education for doctors as a helpful tool, why it’s crucial to address vaccine demand AND supply, and why there’s no “silver bullet” despite the urgent need to get as many people vaccinated as possible.