TMZ is reporting that Kylie Jenner has been hospitalized this week with what a source calls "severe flu-like symptoms," including nausea and dizziness. The 22-year-old has been sick since at least this past Sunday, when she bailed on her planned appearance at the Emmys to present an award alongside sisters Kim Kardashian and Kendall Jenner. While mom Kris Jenner has been vacationing in Paris this week, Caitlyn Jenner is reportedly checking in on their daughter at an L.A. medical facility. The outlet also reports "it's unclear what her prognosis is at this point."