*Theoretical comparisons to historical models of disease progression are for illustrative purposes only.
In fine print at bottom.
the·o·ret·i·cal THe?'red?k(?)l/ adjective concerned with or involving the theory of a subject or area of study rather than its practical application. "a theoretical physicist" synonyms: hypothetical, abstract, conjectural, academic, suppositional, speculative, notional, postulatory, what-if, assumed, presumed, untested, unproven, unsubstantiated