Russia: "What's going on?" Worry

USA: "I don't know." Gets nervous and looks at his bite

Japan: "Hey, who bit you? Worry about the US

USA: "Some animal, well, it'll be fine."

Italy: "Are you sure?"

USA: "I'm sure."

Germany: "Hey USA, are you okay?"

Serbia: "Well, I don't know. Will you really be okay?"

USA: "Yes."

USA looks at his hand and there is fur growing on his hand. And he hides his hand. Bulgaria notices that something is wrong with the US

Bulgaria: "Hey USA, are you okay?"

Poland: "Wot Kurwą. Why doesn't the US tell us?"

France: "Bonjour to all. Uh, USA, what's wrong with you?"