Fly Talk (and this is a long, leading question, by design): Along those "ounce of prevention being worth a pound of cure" lines, there are things that backcountry hunters and anglers should be dialed into--avoid sun and heat exposure, stay hydrated, understand that bugs kill more people than all the lions, tigers, sharks, snakes, and crocodiles in the world, combined--but what's the one "self-help" tip that you think is most important?
Dr. Matthews: Don't travel if you're sick. Don't travel into the backcountry if you are not ready. Sure, that involves seeing a doctor, and getting checked out. But you don't want to be in a jungle and find yourself with a 105-degree fever that you picked up the week before you left. I'd rather be on the space station and come down with something than be in the backcountry and feel sick. They have ways of communicating with and treating people in space. In the backcountry, you're on your own.
Fly Talk: If you find yourself in the backcountry, and you encounter someone who obviously needs medical help, given all the liability issues and other things that might prevent someone from stepping in, what is the key factor?