Holy shit… if I get sick during my vacation, I’ll get those vacation days refunded so I can use them later, when I’m not sick anymore. I can call in sick for up to three consecutive days, 25 days total per year without a doctors note. You only need a doctors note if you exceed those limits, and with a doctors note you have paid sick leave until the doctor says you are fit to work (although the government covers your salary, or part of it, not entirely sure about the details, after the first two weeks or something).