Screening can also mean preventing access of something by some sort of barrier:

Secondary prevention means preventing a disease that a person has already had from coming back.

But the effort to preserve farms doesn't mean just preventing pretty fields of moo cows from giving way to tract houses.

By that, he meant preventing outsiders from coming in and driving prices beyond those the residents can afford.

Paving a way for peace does not only mean preventing armed warfare.

Now he was back to thinking like a doctor, and that meant preventing bloodshed at any cost.

"If it means preventing any more of my marines from dying, then just watch me."

Compliance with the precautionary principle, however, does not mean preventing any technological progress in the field of processing foods.

Do we believe that prevention means preventing life?

Does it mean perhaps preventing all citizens from publicly expressing their religion?