11.   Doctors stop short of saying the disease is always fatal, but medical literature paints a bleak picture.

12.   I had suggested some new tropical disease was a far more likely explanation.

13.   I read last week that the disease is on the increase.

14.   If left untreated, the disease can be fatal.

15.   In the vast majority of cases the disease is fatal.

16.   Most would recover if the disease were let to run its natural course.

17.   Scientists were gradually coming to the conclusion that the disease was hereditary.

18.   The disease can be very serious in adult animals.

19.   The disease is a genetic condition that eventually causes blindness.

20.   The disease is a significant cause of premature death in the developing world.