Cards replaced following Target data breach

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(UNDATED)- JP Morgan is taking action after the massive data breach at Target, replacing 2 million credit and debit cards.

As many as 110 million Target customers were impacted by the hack, including 40 million who used credit and debit cards over 19 days at the peak of the holiday shopping season.

Luxury retailer Neiman Marcus says it was also breached.  Analysts say they wouldn't be surprised if other companies were also hit.