Smiling is the most infectious Healthy Disease. Smiling is infectious, You catch it like the flu, When someone smiled at me today, I started smiling too. I passed around the corner, And someone saw my grin, When he smiled I realized, I'd passed it on to him. I thought about that smile, Then realized its worth, A single smile, just like mine, Could travel round the earth. So, if you feel a smile begin, Don't leave it undetected. Let's start an epidemic quick, And get the world infected.