41.   The virus has a long incubation period, often lingering in a human body for more than a decade before making itself known in a serious illness.

42.   The virus has an incubation period of about a decade before progressing to AIDS.

43.   The virus has an incubation period of three to six weeks.

44.   There, according to Bonazzi, Griffin contracted a form of malaria curious for its multi-year incubation period.

45.   This time, the incubation period and pattern of holes in the brain were identical in the various strains of mice.

46.   Bacteriologist Jacques Grosset told The Associated Press that the bacteria, called Xenopi, has an incubation period of of nine months to four years.

47.   Because of a long disease incubation period, it may be years before the exact toll from vCJD is determined.

48.   Bovine spongiform encephalopathy has an average incubation period of five years, according to the Ministry.

49.   BSE has an incubation period of about five years.

50.   But the parasites have an incubation period of a week or more, so it may take several more days for health problems to develop.