If there are any doubts left that health care data breaches are a major problem, the medical industry just put them to rest. Researchers have published a study showing that a whopping 29.1 million American health records were compromised between 2010 and 2013. Most of them (58 percent) were exposed through theft, but the rest were revealed through a mix of hacks and carelessness, including workers who gave unauthorized access or didn't properly get rid of info they no longer needed.