[Debatable. It's debatable whether it's the best explanation ever, considering his previous description of chickens. Though she listens as intently as ever, frowning at the tech level being even lower than Earth's. That will take some getting used to, though she's confident it won't be too much of an issue.

What is, however....]

A plague? [She asks him, concern obvious in both her gaze and her tone. That always portended ill. The fact there were other islands that were apparently just as bad if not worse... She worries for them.] Lance, you can tell me. While I believe you that not everything is as bad as the islands you've described, I will need to be prepared.

[Though the way he rushed through the more alarming parts of what he had to say... That's what worries her the most. And then Keith tells her he died. Again. Lance, what is she going to do with you?]