mrcem2-0919

A 35-year-old humanitarian aid worker returns from a recent trip to Liberia where she has been working with the British Red Cross. She developed flu-like symptoms a few days earlier but now has severe muscle pain, abdominal pain, haematemesis, and epistaxis. On examination, her temperature is 38.9°C and there are extensive purpura on her limbs and abdomen.

What is the SINGLE most likely diagnosis?