I had fifth disease as an adult fifteen years ago. My doctor was baffled. I basically self diagnosed as he had never seen it before. My teacher friend told me it was going through the classrooms in her elementary school. The kids all had the slapped face look to them and were sent home sick. Turns out it is a much different situation in an adult that never had it as a child. In an adult, it causes liver issues and stiff hands. I could not make a fist in either hand and my liver levels had skyrocketed. There was a minor rash as well. When I found out about the liver situation, I just started to take some milk thistle and it all went away. It was amazing. Since it is usually a pediatric disease, there is no reason my doctor would have known that.