Cho looked like she wanted to help Harry, but she was escorted away from him by Madam Pomfrey before she could do anything. Dumbledore and Ludo Bagman were the ones to help Harry up, while Fleur held her sister protectively as she followed behind. Harry collapsed on a nearby bench between Hermione and Cho and just let Pomfrey do her thing; she wrapped him up in some of those blankets and forced him to drink a strong smelling potion that made steam come out of his ears. But at least he was feeling a little warmer now.