I'm very very late to the game, but I just started playing The Witcher: Enhanced edition on Steam. I have a quest called "She's No Early Bird" which is to get Vesna back to her grandma's house.
I found an old topic online here http://www.gamefaqs.com/boards/950892-the-witcher-enhanced-edition/46132576 that says you can't heal her. Well, got news for you boys, all you have to do its go and meditate for an hour at a fire and she's all healed up. Problem solved!
(and Hello! I haven't posted on here for a long long time!)