Web MD has an interesting web tool called the Symptom Checker. If you, or someone else, is feeling ill, using this application is supposed to narrow down what the problem is and what you might want to do about it.
It’s probably accessible to Intermediate English Language Learners, and might make for an interesting exercise. If the student isn’t feeling sick, you can give everybody a moment to remember a time that they were and compare what they ended up doing to get well with what the Symptom Checker recommends.
I’ve placed the link on my website under Health.