How many sick days should a healthy employee need?
2 per year. The flu only hits once a year - and worst case you’ll get hit with a fever, the peak of which lasts for only a day.
Parents however will have kids who get sick all the time, and use up sicks day for that.
So what is sick enough? Well a 102F fever or more is. Anything else, the employee can work at home if they need to. Otherwise coughing, upset stomachs, back pain, and all that… please, get back to work.
That’s why the Sith believe in the PTO system. You get a lump sum # of days, use it however you want. Otherwise allocated sick time gets abused.