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In page Empress Elisabeth of Austria:

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This same trip proved tragic when both of Elisabeth's daughters became ill. While Gisela recovered quickly, two-year-old Sophie grew steadily weaker before finally succumbing to her illness and dying. It is generally assumed today that she died of typhus.[3] Her death pushed Elisabeth, who was already prone to bouts of melancholy, into periods of heavy depression, which would haunt her for the rest of her life. She turned away from her living daughter and began to neglect her.[citation needed] In December 1857, Elisabeth became pregnant for the third time, and her mother, who had been concerned about her daughter's physical and mental health, hoped that this new pregnancy would help her recover.[4]