Skyrocketing cost of insulin pushes Americans to buy drug in Canada

Insulin is a vital drug that some 7.4 million Americans must take daily to manage their diabetes. But its price nearly doubled from 2012 to 2016, leaving some patients with no choice but to turn to black-market drugs or traveling to Canada, where insulin can be 90 percent cheaper. Special correspondent Sarah Varney reports on the skyrocketing cost of insulin -- and the trend's deadly consequences.

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