If you have days "Specific" for being sick--that you can't take to "hang out" then you are likely to take them when you get a mild cold-- benefit to the company

If you have days "Specific" for being sick--that you can't take to "hang out" then you are likely to take them when you get a mild cold-- benefit to the company is you recover faster and you don't spread your germ. However if it's just "PTO" you are likely to not "Waste" your PTO on a mild cold... thus infecting everyone and making you sick and less productive for longer...