71.   The incubation period ranges from three weeks to three months.

72.   The incubation period is generally four to five days.

73.   The health department said there had been no reported cases of illness from water contamination, but the parasites have an incubation period of a week or more.

74.   The new cases were all people who had been in contact with patients and who developed the disease toward the end of its incubation period.

75.   The parasites have an incubation period of about a week, so any serious health problems were expected to develop next week.

76.   The parasites have an incubation period of about a week, so any serious health problems are expected to develop next week.

77.   The peak season for hepatitis A in Hong Kong is between February and June and the incubation period lasts from one to six weeks.

78.   The second and third generation caught the disease from the previous generations, and the fourth generation includes people who are already in the incubation period, Stroot said.

79.   The typical incubation period for the illness is three to eight days, but can be longer.

80.   The virus has an incubation period of three weeks and WHO expects more cases to be reported from those villages.

n. + period >>共 668
time 7.80%
transition 6.92%
holiday 2.80%
five-year 2.74%
peak 2.70%
six-month 2.48%
trial 2.44%
three-year 2.44%
incubation 2.14%
comment 2.10%
incubation + n. >>共 15
period 81.06%
time 4.55%
test 3.03%
medium 1.52%
process 1.52%
temperature 1.52%
deadline 0.76%
machine 0.76%
mixture 0.76%
service 0.76%
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