I have a player who has Ghoul Fever, and failed a couple saves so now it's ongoing saves each day to try to end it. The team is now trying to stack advantages to the saving throws as he's making the rolls. However, I never thought that the PCs even had a real "time of day" when a save is made -- we mostly just roll in the morning as the game day starts, but the roll is a reflection of 24 hours of disease.
Because of this, I thought short-term boosts would not help. You wouldn't even know when to time them for a save, and if you did, you'd need the boost to last the whole day leading up to the save.
So can casting Remove Sickness at 1st level, in which it only lasts 10 minutes, be enough to grant a +4 to that day's saving throw against Ghoul Fever?
Also, since this is the rules forum, if you do have an answer, I'd love to see any rules text that backs it up directly or indirectly.
Thanks for your advice!