Which is why people freak out about a flu with a noun in front of it!
I mean, I'm not worried about it, but I know a lot of people that are. For all I know, I have it, but I don't think it matters. I started a stupid joke with a girl I got sick with (at the same time, at the same place) where I just renamed (and haven't been able to say it properly since) it, "pig syndrome."