How vaccine hesitancy is causing deadly measles resurgence

As health care officials around the world struggle to respond to novel coronavirus, another deadly -- and far more contagious -- disease is on the rise, fueled in large part by insufficient immunization. In some countries, military conflict diminishes access to vaccines. But in other parts of the world, misinformation and vaccine hesitancy allow the disease to flourish. Hari Sreenivasan reports.

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