A young 28-year-old woman, Gu, was trekking through the rain forests of South American when she felt a strange sensation on her right leg. Looking down, she noticed that an insect about the size of a peanut had landed on her leg. She swatted it away and thought that was the end of it.

But later that evening, her leg began to itch. She didn't think much of it - at first.

Are you ready to hear her story?