When the going gets tough — say, because Amazon is about to take on the pharmacy industry with its vertical-slaying eCommerce retail machine — the tough get going.

Or, at least they go shopping and decide to make a big, splashy and surprising acquisition.

CVS Health Corp. has officially made a move to buy the No. 3 U.S. health insurer Aetna Inc. at a price of over $200 per share. That figure clocks in at a whopping $66 billion, people familiar with the matter said on Thursday.

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