I think the poem posted way up there ↑ had another verse...

A mighty creature is the germ,
Though smaller than the pachyderm,
His strange delight he often pleases,
By giving people strange diseases.
(from memory)
His customary dwelling place,
Is deep within the human race.
Do you, my poppet, feel infirm?
You probably contain a germ.
~ Ogden Nash