Hmm... with the "contagious" part, I almost think "hysteria" might be a better description, since that tends to imply a group effect.
My only concern is that it will be too powerful relative to rewind. Particularly since there is no connection to the time element and rewind is one of times core thematic mechanics.
Other than that, I think it is a very interesting card concept. I like that it can be used both offensively as mass rewind and defensively as anti-deckout.