if you are a doubter, look up the origins of LIME DISEASE and how it spread
What in the hell are you talking about....? First of all, a duel is a battle between people generally settling a point of honor. Dual references two parts.
Secondly, provide some evidence of gassing.....especially of fish. Think about it.
Finally, it's LYME disease. It's spread by ticks who feed on rodents and humans. It's origin and method of transmission are similar to bubonic plague.