No. News papers are not sterile, but hey when you are in a pinch, use what you have got available. So long as you are not dealing with an open fracture it should be ok. If you do have and open fracture you will need to dress the open wound first if it's bleeding badly. That should afford you enough protection to apply your news print splint.
No, newspapers are not sterile as they can harbor various types of bacteria and viruses, especially if they have been handled by multiple people. It is always advisable to wash your hands after handling newspapers.
the flower is sterile
If a sterile field becomes "contaminated" with a sterile solution, the field remains sterile.
sterile gloves
No it's not sterile
sterile
This definition is only one or the other. Either sterile or non-sterile. There is no such thing as partially sterile.
Sterile is clean and clean is sterile, so both
Are mucous membranes sterile
sterile
The healthy human lung is sterile
One is guaranteed to have no microorganisms on it inside the sterile packaging, the other is clean but is not guaranteed to have no microorganisms on it.