If they’re young, a level of exhaustion. If they’re middle-aged, 1d4 levels of exhaustion and a death save once per day.
Oh, and Cure Disease does nothing.
Hot chicken soup.
And a pint of whiskey.
Rules wise? If the character is female, no real change - you can continue adventuring as effectively as before. If the character is male then it's straight up Death Saving throws every round until the brave hero finally bites it.
Man-flu. Remember the fallen.
a pint of whiskey. [/B]