"ABC-Medicine.com: medical dictionary,"

An contractable disease is a clinically plain disease of humans or animals that restitution or injures the patron so as to deflower patron function, and results from the proximity and state of digit or more pathogenic microorganism agents, including viruses, bacteria, fungi, protozoa, multicellular parasites, and abnormal proteins famous as prions. Transmission of an contractable disease haw become finished individualist pathways; including finished occurrence with pussy individuals, by water, food, airborne inhalation, or finished vector-borne spread.

A contagious disease (also titled a contractable disease) is an contractable disease that is confident of existence transmitted from digit mortal or species to another. Contagious diseases are ofttimes distribute finished candid occurrence with an individual, occurrence with the corporeal fluids of pussy individuals, or with objects that the pussy individualist has contaminated.

The constituent infectivity describes the knowledge of an drive to enter, endure and multiply in the host, patch the infectiousness of a disease indicates the comparative assist with which the disease is transmitted to another hosts. an incident however, is not substitutable with an contractable disease; as an incident haw not drive clinical symptoms or deflower patron function.

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