What is the difference between a Doctor Who an MD and F.A.C.S.?

A Doctor Who is a fictional character from the British science fiction television series of the same name. The Doctor is a time traveller from the planet Gallifrey who explores the universe in his TARDIS, a time machine that looks like a police call box.

An MD (Doctor of Medicine) is a professional degree in medicine. It is the highest degree awarded in the field of medicine and is required for practicing medicine in most countries.

F.A.C.S. (Fellow of the American College of Surgeons) is a professional designation awarded to surgeons who have demonstrated excellence in their field. To become an FACS, a surgeon must complete a rigorous training program and pass a comprehensive examination.

In summary, a Doctor Who is a fictional character, an MD is a medical degree, and F.A.C.S. is a professional designation for surgeons.