 To allow it to be airborne. And so I don't want to talk about two different things and get complicated. Sure. Well, I'm talking about the research that was conducted by Yoshihiro Kawaoka. Yes, exactly. No, 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.