My apologies if this has already been asked recently in another thread -- I did a search and came up with nothing.

Anyway, one of my young villagers (about 25) is showing as "weakened." At first I wasn't sure why, but now I think I recall him having opened a box that washed up on shore (one of those pop-up windows that comes up every now and then) that contained poisonous spiders, and he sustained "grievous injuries," according to the message box. He's not showing as sick, so I can't have one of the doctors heal him. I'm just wondering -- is he going to be "weakened" for the rest of his life, or can I expect this to go away sometime soon?