Duh!

It may be, as Ezra points out, totally obvious. But I guess on the whole I'm happy every time solid information is released highlighting big business' contempt for sick workers:

Many businesses complained that the Labor Department’s definition of a serious health condition enabling workers to take leave was unclear and too generous. Many companies also said their operations were hurt when workers with chronic conditions, like asthma or migraine headaches, took frequent leaves.

Yeah, you big babies! Sack up!