81.   Flu viruses deteriorate quickly, so researchers have been looking for years for bodies of victims where the virus might have been preserved by freezing.

82.   Five people in mainland China had been stricken by the new strain of bird flu virus before it sickened two children in Hong Kong, newspapers reported Friday.

83.   Flu viruses deteriorate rapidly, which has been a problem in studying the Spanish flu.

84.   Flu viruses follow well-worn paths, starting in Asia and heading east, health officials say.

85.   Flu viruses follow well-worn paths, starting in Asia and heading east.

86.   Four Giants have been hit by a nasty flu virus, and J.T. Snow was still to ill to play.

87.   He added that tests for the virus were not carried out on insects because they were known to be incapable of transmitting flu viruses.

88.   In order for a flu virus to cause a pandemic, Kahabbaz said, it must be capable of person-to-person transmission and there is no proof that has happened.

89.   LIVE poultry markets will continue to carry the threat of the bird flu virus, an influential expert has warned.

90.   Medical authorities recommended that doctors ban visitors from hospitals to stop the flu virus from spreading.

n. + virus >>共 196
flu 11.16%
stomach 10.81%
smallpox 6.24%
influenza 5.18%
hepatitis 4.92%
herpes 4.83%
macro 3.51%
polio 3.34%
bird 3.34%
encephalitis 2.81%
flu + n. >>共 105
shot 12.59%
virus 12.59%
vaccine 11.40%
season 9.91%
symptom 8.82%
epidemic 5.85%
strain 4.16%
bug 3.27%
scare 2.97%
case 2.87%
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