No problem.
Just get a doctor's note and you will be excused.
“I have no test for the common cold and therefore believe him, however you feel his time and mine should be wasted by making him sit in the walk in clinic for hours and me spending time writing a sick note that I could be spending on people who genuinely need my attention,” the note continues. “Please reconsider your policy on this - there are surely better ways of wasting your tax dollars.” - Opposing Views
BOOM!