This incident, which happened immediately after the previous one, displays a different aspect of Jesus" authority, His power over physical sickness. In Jesus day, people regarded fever as a disease not necessarily related to other maladies. [1][source]
"The Talmud gives this disease precisely the same name ..., "burning fever," and prescribes for it a magical remedy, of which the principal part is to tie a knife wholly of iron by a braid of hair to a thornbush, and to repeat on successive days Exodus 3:2-3, then Exodus 3:4, and finally Exodus 3:5, after which the bush is to be cut down, while a certain magical formula is pronounced. (Shabb37a)." [2][source]
The account is full of detail that must have come to Mark through Peter, who had a special interest in this healing. Evidently Andrew and Simon shared this house with Simon"s mother-in-law and perhaps other family members. Jesus" power resulted in instantaneous and complete recovery. The fact that Peter had a family helps us appreciate the sacrifice he made to follow Jesus. [source][source][source]