Why are most hazardous food recalls voluntary?

FDA product recalls seem to be almost ordinary, with fears of salmonella poisoning and undeclared allergens making regular appearances on primetime news. But up until recently, these recalls were merely suggestions made by the FDA—whether the product was actually removed from shelves was completely up to the company, putting most of the responsibility into the hands of the consumer in terms of knowing what produce was safe to buy and eat.
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