He said to them, "Doubtless you will tell me this parable, 'Physician, heal yourself! Whatever we have heard done at Capernaum, do also here in your hometown.'"

 Here Luke the doctor writes. In the grip of a major fever--every word is a medical term. In the grip of is the medical Greek for someone definitely laid up with an illness. The Greek medical writers divided fevers into two classes--major and minor. Luke knew just how to describe this illness. 