In civil court, you basically have to prove that it was more likely than not the gas. That's really hard to do for chronic symptoms. Are you sure you didn't h

In civil court, you basically have to prove that it was more likely than not the gas. That's really hard to do for chronic symptoms. Are you sure you didn't hit your head at some point? Does anyone in your family have any history of similar symptoms? Are you sure it isn't Legionaire's Disease, or Lupus, or some other House MD thing that only 4 people get per year? There are tons of risk factors for everything. If you're a smoker, and you worked in an asbestos factory, did the cigarettes or the factory give you lung cancer? I'm a little surprised that some kind of gross negligence doesn't apply, regardless of any damages proven. Perhaps there wasn't any evidence they were aware?