Here is how Yuna all better goes in A Sick Day for Yuna.
Dusty Crophopper: How much does she have so far, Dr. Horse?
Dr. Horse: So far, She still has only one more week.
Tigatron: Your Majesty! Airazor and I have a cure for her sickness from Zecora!
Princess Celestia: Here, Yuna, Take a drink.
Ishani: I hope it works.
Princess Yuna: (drank every last drop) I feel better!
Princess Luna: I'm glad to hear, Daughter.
Princess Yuna: Now, I can go play with my friends again.
Hiro: That's wonderful, Yuna.
Princess Yuna: Thank you, Aunt Celesita, Thank you, Catrina, Thank you, Discord, I'm feeling better already.
Princess Celestia: You're welcome, My Niece.
Princess Yuna: It sure was great getting better for some more fun!