Pepe Le Pew comes to chase Cersei Lannister. She doesn't mind being caught. And many of the characters recite Pepe's "Ah, the adoration..." type speech. Somehow this guy magically makes everyone catch the plague. If he was a carrier; and snuck his blood into wine, food, etc.; it would make sense. But no. Magic. So he was killed, but became alive to get revenge. And somehow he became French; like Pepe Le Pew. But after all, this is ALL fiction. Like Pepe Le Pew.