Hippocrates was a physician who created a statement of basic ethics, while Herodotus was a historian who shaped how events are recorded.
In fact nowadays, there are some medical students who have to take Hippocratic oath when becoming doctors, which states how they should behave as doctors.
Hippocrates was a Greek physician of the Age of Pericles who is considered one of the most notable figures in the history of medicine.
Hippocrates was the founder of medicine, regarded as the greatest physician of his time, based medical practice on observations of the human body. Where as Herodotus wrote about the wars between Persia and Greece and he became one of the first true historians in Western civilization.