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 I 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!