Even within North America, Mexico and Canada have closed thousands of miles of border to all but essential travel, roiling plans for vacation, work, and school.
As their son's disease began to rewrite the routines of daily life, the Bolands planned to cross into Canada again to restock.
"We were going to make a trip north, one more trip in March, but then they closed the border," she said.
Many medicines and medical services are cheaper in neighboring Canada and Mexico, thanks to price controls and the power of the US dollar .
And the difference between those prices and the costs of the same drugs at US pharmacies can mean life or death.
Americans have been going to Canada for insulin since scientists learned how to produce it in labs at the University of Toronto in 1921.
A hundred years later, and after national soul-searching over the soaring cost of insulin, some Americans are still starving themselves. »
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