After a few weeks, pinkie was back to normal.
All of us had to leave the hospital if we had something to do, like I had some flying practice with the wonderbolts, twilight had to check on spike and starlight, rarity had some dress orders, fluttershy had to check on her animals, and applejack had to see how her family was back at sweet apple acres.
We all had stuff to do but despite all that, we stayed with pinkie through the entire situation, and when she got relesed from the hospital, she threw a welcome back party for herself, classic pinkie pie, and we all had a blast at the party.
We even all made a new friend in the meantime, we got to know more about rainbow sparkle and even learned her father is in the royal guard in canterlot, of course, rarity flipped out when she heard that part.
Everything was great and if anypony else got the sickness, the nurses let their friends hang out with them until they were cured.
We were all happy.