Children, Children, lets play nice. Okay?

Your tantrums really look childish in the light of my original post. To whit:

I have a friend who may well be dying of a small cell carcinoma who would like to hope he might beat this thing and get back in his shop one day. He realizes his lungs are going to be fragile and wants the best protection he can get.

So, are there any quality recommendations that I can pass along to him?