Do you work for a big company? Have you been having back pain? Your company probably knows about it already thanks to high-tech healthcare companies that it hired. Welcome to our brave new world of big data.

Source: Companies Are Using Big Data to Discourage Employees From Having Costly Surgery

They are using this to improve the health of their employess. Good. But also to track who is trying to get pregnant. Bad. Health information is very private for a reason. Having your employer look at it is very very bad and can lead to discrimination based on your medical history.