A smile...........

Smiling is infectious,
you catch it like flu,
when someone smiled at me today,
i started smiling too,
i passed around the corner,
and someone saw my grin,
when i smiled i realized,
i did pass it on to him,
i thought about the 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 let the world be infected.