71.   Kusinitz was told in advance that as part of a control group he would contract the disease.

72.   Lucy believes she contracted the disease on the job as a health care worker, before the virus was identified.

73.   Mad cow disease is contracted by animals that eat the tissue of other infected animals.

74.   Mad-cow disease is contracted when the animals eat organs of other diseased cows.

75.   Millions of people probably came into contact with infected meat, though it is not clear how many will actually contract the disease, Smith said.

76.   Most contracted the disease as children, picking up the parasite as they swam or bathed in water with infected snails.

77.   No one is known to have contracted the disease this way.

78.   Not one, she said, has contracted the disease.

79.   Officials said they remained puzzled as to how she contracted the disease, and they are still closely monitoring emergency rooms and clinic admissions.

80.   On Monday, Westchester County officials announced that two people there had contracted the disease.