41.   Orphans were used as human guinea pigs after World War II to test experimental vaccines for diphtheria and whooping cough, a newspaper reported Tuesday.

42.   Researchers are also currently testing vaccines on patients already suffering from a variety of other cancers.

43.   Researchers will soon test a vaccine to overcome the jack jumper sting and believe their work could also benefit those suffering cancer and heart disease.

44.   Saul said the money would allow the vaccine to be tested in the field, where malaria was rife.

45.   Saul said the money would allow the vaccine to be tested in the field.

46.   Scientists are developing another test which they say could be applied before polio vaccines are tested on animals, leading to a possible reduction in animal use.

47.   Speaking on radio on Tuesday, he said vaccines were tested on animals to see whether there were any toxic effects.

48.   Speaking on radio Tuesday, Vaux said the vaccines were first tested on animals for any toxic effects before they were given to humans.

49.   The company would not discuss details of the laboratory trials, but said it began testing the vaccine in healthy, uninfected volunteers last week.

50.   The agencies, working with Kenyan authorities, have begun testing the vaccine on adults in the western Kenyan town of Kisumu, where the disease is especially prevalent.