Naruto: Outbreak

is episode 183 of the Naruto: Shippūden anime.

Summary
Sakura, Shizune and Tonton are all sitting in a camped tent by Tsunade, who has remained comatose since Pain's Invasion. Chōji and Naruto arrive with lunch for them. As Naruto leaves to aid in the rebuilding of Ichiraku Ramen Chōji and Shizune comment on his energetic personality and Chōji's quote leads Sakura to a flashback. She recalls a day when Naruto returned from a mission in an unkown village and appeared to be sick. Naruto sneezes on Sakura, who was about to depart on a mission. Later, after overeating at Ichiraku Ramen, Naruto is reseting in his apartment when a group of Konoha medical ninja attempt to capture him. Throughout the episode Naruto eludes the medical team and other characters who have been ordered by Tsunade to capture him. After interrogating a medical-nin Naruto learns that his capture is under Tsunade's orders as she believes that he is the carrier of a rare and dangerous chakra virus that effects a person's ability to mold chakra. Since the village was still recovering from the Invasion of Konoha Tsunade did not want anything to cripple the village. After Naruto is eventually captured and sent to Konoha's hospital it was discovered that he was never infected. Naruto, infuriated at Tsuande's actions, demands an apology. Tsunade merely says that it was an emergency drill and thanks Naruto for cooperating. Naruto remains angry at her and explodes in a fury of rage as Sakura ends the flashback. She then notes that Chōji's quote, "Fools never catch a cold", may be true in Naruto's case, but that he certainly knows how to stir things up.