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Fruitcakes were also popular due to their legendary shelf life, which, in an era before mechanical refrigeration, was extremely desirable.

Improvements in milk quality, milk production, transportation, refrigeration and processing all led to greater quantities of milk, greater shelf life and greater access to products across the U.S.

In the past, sushi restaurants were not equipped with refrigeration facilities when eating sushi, so there were many fish that were slightly rotten.

According to the WHO, safe transport and refrigeration of the vaccines are crucial to the plan.

Before the invention of refrigeration, milk would quickly sour.