Terpsichore & Tuberculosis

Here's a question: can it's be a contraction for both it-is AND it-has? Because I'm still sick, and it's been more than a week now. My condition is irksome.  I'm beginning to question how long it'll last; I once had this same affliction last for three solid months. But then, it's just a cold. Or is it? Perhaps my numerous dance classes have brought on something dire. *eyeroll*

Modern Mechanix Magazine: Dec, 1932

And before I forget, "Terpsichore" is the mythological greek muse of poetry and dance. A literal translation of her name means "delighting in dancing." That's where that random vocab word sprung from. :)