Sick days are different in Abu Dhabi. At my school, we do not have a sub folder and emergency sub plans (staples of teaching in the US). We notify our vice principal, and if Cycle 1, the head of faculty, about our absence, and they find coverage from within our staff for the classes. For some teachers, it is a bonus bit of class time, or allows for an earlier class meeting. The real work takes place on the part of the sick teacher. The teacher must go to the hospital and see a doctor on the day of her (I will use the feminine pronoun because hey, I'm a girl) absence. It may be a long wait depending on the hospital chosen. The doctor will diagnosis; prescribe any medicines, vitamins, procedures, etc. to treat the sickness; and give a stamped sick note certificate to the teacher. The teacher then must go to the pharmacy to fill any prescriptions (usually in the same building). After which, the teacher will take the sick note certificate to the Health Authority for a stamp.
It does not lend itself to a restful day, which, in truth, is probably what the teacher needed in the first place.