' Wrote:We don't know if they do. Diseases are capable of mutating to infect both animals and humans, why not alien lifeforms as well? A foreign disease that their race has no immunity against could decimate their population.
The odds are also against it to a staggering degree. We're not talking about smallpox infecting two different groups of humans here. In fact, I would even say it's different from diseases transmitted between animals here on Earth.
There's a faint chance, I'll grant you that. But I'd put it somewhere in the realm of "getting struck by lightning seven times and surviving" - yeah, it might happen, but don't count on it.
