The soundness and value of any opinion held concerning the origin or impulse of infectious or contagious movements taking place in the human system, or amidst human populations, must of necessity depend upon the reasonableness of the evidence brought forward in support of such view or opinion; and, of the various hypotheses advanced by different writers to explain their occurrence or beginning, as the vital cell (Beale), the nervous theory (Richardson), or the parasitic-life doctrine, as expounded by Pasteur, Koch and others, the evidence afforded by observation and experiment in favor of the last named, seems to largely out-weigh the arguments put forth in behalf half of the two first mentioned.
Aside from the many nearly conclusive showings yielded by experience and demonstration—all pointing to the active presence of living particles as the influential causes and movers of displays of infectious or epidemic power—there are additional strong arguments in its
HOMAN G. THE PROMISE AND POTENCY OF CLEANLINESS. JAMA. 1885;V(12):315–316. doi:10.1001/jama.1885.02391110007001a
Coronavirus Resource Center
Customize your JAMA Network experience by selecting one or more topics from the list below.
Create a personal account or sign in to: