Final answer:
Human-specific disease refers to an infectious disease that usually occurs only in humans and not in animals. It is unlike zoonotic diseases which are transmitted from animals to humans. (Option D).
Step-by-step explanation:
The term for an infectious disease that occurs predominantly or exclusively in humans and not in animals is a human-specific disease.
This type of disease is distinct from a zoonotic disease, which is an infectious disease that humans acquire from animal species.
A zoonotic disease might be caused by various types of pathogens, including viruses, bacteria, fungi, or protozoans.
Examples of zoonotic diseases include rabies, yellow fever, and Rocky Mountain spotted fever.
Human-specific diseases, on the other hand, include illnesses like the common cold, influenza, and HIV/AIDS, which are primarily transmitted from humans to humans and do not have animal reservoirs.
Hence, the correct answer is Option D.