I used to work for a very well-known, global company. We had a very strict call-out policy. Three "sick" incidents in a year would get you a write up and on probation. Any calls outs during probation would result in termination. That being said, I had a coworker who was approved to take FMLA for her chronic sinus infections due to the nature of our job. She didn't abuse it, but she did end up getting fired when she went on a short trip to a third-world country with friends on her days off, and got sick and couldn't fly home in time for work. The company accused her of lying so she could stay - alone - in this country a few more days.