A third of Americans could have had data stolen in big health care hack [Video]

A third of Americans may have had their personal data swept up in a February ransomware attack on a UnitedHealth Group subsidiary that disrupted pharmacies across the U.S., UnitedHealth CEO Andrew Witty estimated in testimony to Congress on Wednesday.It will likely take “several months” before UnitedHealth is able to identify and notify Americans impacted by the hack because the company is still combing through the stolen data, Witty said in written testimony.Watch the report above on the February attackIn hours of hearings in the Senate and House Wednesday, Witty apologized to patients and doctors, admitted that hackers broke into the subsidiary through a poorly protected computer server and confirmed that he authorized a $22 million ransom payment to the hackers.The testimony shows that the scope of what experts consider to be the most significant health care cyberattack in U.S. history is even bigger than previously known. And the hacking incident …