Who was Panacea in Greek mythology?

In Greek mythology, Panacea (Greek 'Πανάκεια') was a goddess of universal remedy and the daughter of Asclepius and Epione. Panacea and her four sisters each performed a facet of Apollo's art:

Panacea (the goddess of universal health), Hygieia ("Hygiene", the goddess/personification of health, cleanliness, and sanitation), Iaso (the goddess of recuperation from illness), Aceso (the goddess of the healing process), and Aegle (the goddess of beauty, splendor, glory, magnificence, and adornment).

Panacea may have been an independent goddess before being absorbed into the Asclepius myth. Panacea traditionally had a poultice or potion with which she healed the sick. This brought about the concept of the panacea in medicine, a substance meant to cure all diseases. The term is also used figuratively as meaning "Something used to solve all problems".

Panacea is mentioned at the opening of the Hippocratic Oath: 'I swear, calling upon Apollo the physician and Asclepius, Hygeia and Panaceia and all the gods and goddesses as witnesses, that I will fulfill this oath and this contract according to my ability and judgment'.