Bitten by the Bug

They come in every size, it seems—
Those dirty little insects!
They bite us once then we get sick;
It’s just a human reflex.

There’s them that’s just too small to see
Because they’re microscopic
And others buzzing nastily
Like skeeters in the tropics.

The problems that they give me go
Beyond a nose that’s runny;
Not only do they make me sick,
They cost me lots of money.

But there’s one illness I can’t cure.
It causes me vexation:
I’m never bitten by the bug
To take a cheap vacation.