I don't know what's done this. It may be some sort of airborn contagion or a sexually transmitted disease, in which case we're all completely boned. We can't be saved. We can only hope that someone out there realizes this and burns the whole place.
But there's a chance. There's a chance for some of us. No skin contact. If you have gloves, for God's sake, put them on now. Don't take any food or water offered you. Don't eat or drink anything that doesn't come from a sealed container.
If anyone tries to enter your home, even someone wearing the face of a friend, don't admit them!
If you have to...I know this is hard, but if they force their way in, the only response, for humanity's sake, is to shoot.
-- phosfate...and if this doesn't make sense, click here...
EDIT: Then later:
I must apologize for my paranoia and hostility of earlier this morning. I...things haven't been going well in my personal life lately, and I'm afraid that I found the sudden change threatening and just...lashed out. Also, I think someone may have hacked into my JF account, possibly my little sister.