Intergalactic disease among humans

[RyanW]

Originally Posted by zylosan

A big factor in the development of disease is the presence and varity of domestic and wild animals. Some of our nastest disease come from the animals we keep. New planet, new eco system = lots of opp for death

It's very likely that a new ecosystem would not present many dangerous contagions. The classic line is that Spock's mom would have had a better chance of conceiving with a horseshoe crab, and the same likely goes for alien viruses. A transplanted ecosystem would be a much bigger hazard.

Bacteria-like infections might be a different issue, as they may function very well on water and sugars, rather than DNA. Likewise toxic chemicals.

Edit: Of course, such an ecosystem is unlikely to support a human population, as well. If the aliens don't use very similar amino acid structures as humans, they aren't food.