11.   After the problems caused by HIV and various hepatitis viruses, the discovery of any new virus in donated blood is worrying.

12.   But the finding of a hepatitis F virus, as they called it, has not been confirmed.

13.   Chimpanzees are well suited for such work because they can carry human hepatitis viruses, Ms. Brotman said, but unlike their human relations do not develop serious illness.

14.   Even when treated with a virus-suppressing drug soon after it is acquired, the hepatitis C virus is likely to result in a chronic liver infection.

15.   Everything hinges on how quickly Akinwande becomes free of the hepatitis virus.

16.   Fibrin sealants entered combat in the last year of World War II but were put on the back burner shortly afterward because they could transmit the hepatitis virus.

17.   For the scores of medical research scientists toiling in laboratories around the world to unlock its secrets, the hepatitis C virus is a formidable adversary.

18.   Hamm said she has gotten letters from inmates who have been diagnosed with the hepatitis C virus and worry they will not receive treatment until the disease progresses.

19.   Hepatitis C is one of a class of hepatitis viruses, including A, B and D, and perhaps is the most serious.

20.   Hepatitis C is only one of a class of three hepatitis viruses that can affect liver function.