Supermarkets are rationing grocery-store staples and trying to restock more quickly to deal with surging demand, while planning new ways to feed a rising number of self-isolating consumers as coronavirus spreads across the U.S. and Europe.

The move to limit purchases of sought-after items comes despite some retailers stocking up on staples in anticipation of a rush. As the epidemic worsens, grocers are exploring redeploying workers, curbing stores’ operating hours and tapping the military and volunteers to deliver food.

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