Well, at least the parasite endemic among humans sure is in decline now
Similarly, in science, Occam's razor is used as an abductive heuristic in the development of theoretical models rather than as a rigorous arbiter between candidate models.[5][6] In the scientific method, Occam's razor is not considered an irrefutable principle of logic or a scientific result; the preference for simplicity in the scientific method is based on the falsifiability criterion.
https://en.m.wikipedia.org/wiki/Occam's_razor
Coincidentally: