What would be the best system for a magic healer?

[Johnny_Bravo]

It’s astonishing what nonsense the brain sometimes remembers.

Zap! You're a healer; what do you do?

The Flying Spaghetti Monster graces you with one of its noodly appendages and gifts you with a limited power of healing. The power given to you, as revealed by the FSM, is that you can stop a condition getting worse, hopefully allowing the body to recover. So, for instance, you can’t magically instantly fix a broken bone, but a cancerous growth will stop growing and won’t spread. All you have to do is touch the person. What do you do?

I posited that airports are already set up to intake/output huge numbers of people every day, so if you were after sheer quantity, the infrastructure is available.