 To allow it to be airborne. And so I don't want to talk about two different things and complicate things a bit. Sure. Well, I'm talking about the research that was conducted by Yoshihiro Kawaoka. Yes, exactly. And that research was to see in the laboratory, could I make it go from birds to human cells? That didn't change the mode of transmission. And airborne transmission is really the only way you get an epidemic response.