I don't work at a fast food place, but the company I work for has a point system for sick days. Every day you call in gets you 1 point, 3 points and you are fired. the points stay on record for 6 months. Atleast 3 people have been fired cause they got the flu or something and had to call in for a week. Even before they started this, if you called in even once it would count against you on your review and you wouldn't get a raise that year.
Companies in America have been treating their employees like shit for decades, I'm glad its finally coming back to bite them in the ass.