Setting: secondary world analogous to England in the 1350s, with some magic
The situation: A group of about 30 people suffers a smallpox outbreak. They're relatively isolated from other people (though clearly not isolated enough!), and for plot reasons cannot call on anyone for outside assistance. Food and drink aren't a concern, and a small number of the group (I'm thinking 3 - 4) are immune due to prior exposure. The magic in this world is low-level stuff. It's not going to cure anything, just help people survive.
ETA: Thanks, all! I love it when the answer I get is the answer I want.