In the fanfic, Naruto might be in the hospital because of some strange illness that no one has seen before. The doctors in the hospital are trying all kinds of methods to cure him, and he might be feeling really frustrated lying in the bed all day. He could be thinking about all the things he wants to do once he gets better, like going on new missions or training harder.
It's possible that Naruto is in the hospital as a result of a self - sacrifice he made to save the village. While in the hospital, he could be having dreams about his past adventures and the people he has met. His presence in the hospital might also inspire the other patients there, as they see his determination to get well and continue protecting the village.
Well, in some fanfiction, Naruto could be in the hospital because of a new and strange illness that no one has seen before. The story could focus on the doctors in the ninja world trying to figure out a cure. And Naruto being Naruto, he might be cracking jokes with the nurses and other patients, spreading his positive energy even while sick.
In the 'Harry goes to the hospital fanfic', it's possible that Harry is injured during a Quidditch match. He is then rushed to the hospital. There, he could discover a hidden part of the hospital that has some ancient magic stored. He might also have some deep conversations with his friends who come to visit him about their future plans and the current state of the wizarding world.
In fanfiction, when Naruto goes to the hospital, he could discover a new medical jutsu being developed there. He might get involved in the process, either by accident or because the doctors need his help. Since he has so much chakra, it could be useful for testing or something related to the new jutsu.
One possible plot could be a story where Naruto gets seriously injured during a battle and is taken to the hospital. There, he meets a young and talented medic - ninja who has a unique healing ability. As he recovers, they form a bond and the medic - ninja helps Naruto discover a new way to control his chakra, which in turn helps him become stronger.
Well, in the fanfic, Adrien could be in the rubble hospital due to a battle gone wrong. Maybe he got seriously injured while fighting an akuma. The hospital setting might be a place for him to have some self - reflection and also for his relationship with Ladybug to develop further, like she could visit him secretly.
Perhaps there could be a situation where the kids get into trouble, like accidentally releasing a small animal from a cage. Naruto would then have to use his quick thinking and ninja skills to catch the animal and keep the kids safe at the same time. This would show his ability to handle unexpected situations while babysitting.
Obviously, Naruto could be one of the main characters. He could be either a patient or someone helping out at the hospital. Another main character could be Sakura. Since she has medical skills, she could be a doctor or a medic - ninja in charge at the hospital. And then there could be a new character, like a young orphan who is being trained as a medic - ninja at the hospital and has an interesting backstory.
His teammates, Sasuke and Sakura, would surely visit him. They are his closest comrades, and they would be worried about his condition.
Perhaps in this fanfic, Naruto would be confused by the concept of the Avatar at first. But as he gets to know more about it, he realizes the similarities between his world and the Avatar world in terms of protecting people. He might also have some interesting interactions with the different tribes in the Avatar world, like the Fire Nation. And who knows, he could even find a way to use chakra to enhance bending abilities.
In the 'Naruto finds an egg fanfic', Naruto may take the egg to his teacher, like Iruka. They might study it together. It could be an egg of a rare creature. Naruto's sense of adventure would lead him to discover more about the egg, and perhaps it will hatch into a cool animal that becomes his new friend or ally.