When a person discovers a disease it is usually named after them. This is called, "Eponymous."
Eponym
An eponymous condition is named after someone.
When a disease can be moved from person it can be known as an Infectious disease, a Transmittable disease, or a communicable disease.
Saturn has been known for thousands of years. No particular person discovered it.
Coral has been known to man since ancient times. No one person can be named that discovered it.
Leprosy, also known as Hansen's disease, is a chronic infectious disease caused by the bacterium Mycobacterium leprae
Mononucleosis or mono otherwise known as the kissing disease
The name of the person who discovered the glockenspiel is not known. This unique instrument rose to popularity in the 1960's.
The big dipper was discovered thousands of years ago and the name of the person who discovered it was not recorded.
No person actually discovered it as it is visible to the naked eye and was known by the ancients.
Galena - the ore of lead has been known form ancient times therfore the person who first discovered/identified it is unknown.
Lead has been known since ancient times. The exact person who discovered it is unknown. It is a blue-white metal element.
No single person is credited with having discovered coal, and no precise date of its discovery is known. The Chinese, however, are known to have used coal over 3,000 years ago.