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People in wealthy, industrialized countries are used to finding their supermarket shelves fully stocked. Yet for a brief period early in the COVID-19 pandemic, some of those shelves emptied out, as panic drove shoppers to stockpile and supply chains were interrupted. For many, this came as a reminder that our food supply system is not invulnerable, and that it may come under much more serious strain in the future in response to unexpected catastrophes.