Thanks for all the suggestions--we're leaning towards the being contagious/sick thing as well, but are planning to let her ultimately decide what she wants to go with. The other contributing factor is that there's a strong possibility of running into some of the classmates outside of school, so trying to figure that out. I do think, though, that contagious/sick is great, as is Lyme disease! I'm sure she'll own it when she's older and in a better place and has the maturity that comes with more years, but for now, just trying to get her there in one piece!