91.   While scientists have made considerable progress in preventing and treating pneumonia and other secondary infections that often kill AIDS patients, progress against the virus itself has been halting.

92.   Leukemia is a cancer of the blood in which infection-killing white-blood cells multiply at an uncontrolled rate, eventually killing the patient.

93.   Strokes are twice as likely to kill patients who already suffer from irregular heartbeats, according to a study released Thursday.

94.   The operation also has a high probability that it will kill the patient, according to the FDA.