Bob Herman Mar 1, 2017
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Anthem's historic data breach: What we still don't know 2 years later

Darron Cummings / AP

It's been more than two years since health insurer Anthem publicly announced it was the target of a cyberattack. Hackers stole the birthdays, Social Security numbers and other data for nearly 80 million people — the largest health care data breach ever — yet there are still some unanswered questions.

There's no definitive conclusion of who the hackers were, or whether Anthem faces penalties from the federal government. However, some useful information came from a recent investigation from multiple state departments of insurance.