Contagion

Elephants are contagious!

Be careful how you tread.

An Elephant that's been trodden on Should be confined to bed!

Leopards are contagious too.

Be careful tiny tots.

They don't give you a temperature But lots and lots - of spots.

The Herring is a lucky fish From all disease inured.

Should he be ill when caught at sea;

Immediately - he's cured!