Nocebo Ending Explained [SPOILER!]

SPOILER ALERT: the following article contains massive spoilers, including the ending. If you have not yet seen the movie, proceed at your own risk, or better, come back to this article later!

SPOILERS AHEAD

Nocebo Summary and Synopsis

A fashion designer (Eva Green) suffers from a mysterious illness that confounds her doctors and frustrates her husband (Mark Strong) — until help arrives in the form of a Filipino nanny (Chai Fonacier) who uses traditional folk healing to reveal a horrifying truth.

Source: Wikipedia (CC BY-SA 3.0).