Technically didn't experience the disease, but it fits with the tread so I'm going to say it.
When I was an infant a medical test came back saying I tested positive Cystic fibrosis, a serious respiratory disorder that causes organs such as the lungs to produce large amounts of mucus, which can result in difficulty breathing and a dramatically shortened lifespan. My parents then had a more accurate test done which showed that I tested negative. Sometimes I do wonder what would happen should I have actually had it, and how it would have affected my life.