“Laughter is contagious and I'm trying to start an epidemic.”
“That is the paradox of the epidemic: that in order to create one contagious movement, you often have to create many small movements first.”
“There is nothing in the world so irresistibly contagious as laughter and good humor.”
“There is nothing in the world so irresistibly contagious as laughter and good-humour.”
“There's nothing more contagious than the laughter of young children; it doesn't even have to matter what they're laughing about.”
“There are exceptional people out there who are capable of starting epidemics. All you have to do is find them.”