Taylor Swift on the inspiration behind ‘Patient Zero’ via Capital FM: “The story behind me writing the song ‘Patient Zero’ is that I was hanging out with a bunch of friends, and one of my friends told us that she had been reached out to by the new girlfriend of an ex of hers, asking for guidance on if she had had the same experiences with this guy, everyone in our group just immediately started saying like, ‘Oh, I've been through that too,’ and telling the stories of when this kind of reach out had happened for them.”