1.   Public health officials warned of an influenza outbreak.

2.   Epidemiologists consider influenza outbreaks in nursing homes reflective of the larger community.

3.   It annually works to monitor and lessen influenza outbreaks.

4.   Tracking influenza outbreaks and changes in viral strains is a bit like tracking hurricanes.

5.   Union sickouts occur perhaps as frequently as an influenza outbreak.

6.   And UN officials said local fighting in northeast Badakhshan province has prevented aid workers from treating a suspected influenza outbreak that has left more than two dozen children dead.

n. + outbreak >>共 111
cholera 19.82%
disease 13.09%
anthrax 8.36%
plague 6.36%
flu 4.73%
virus 2.91%
smallpox 2.73%
bird 1.64%
encephalitis 1.64%
fever 1.45%
influenza 1.09%
influenza + n. >>共 43
virus 36.42%
vaccine 12.35%
strain 7.41%
outbreak 3.70%
epidemic 3.70%
pandemic 3.09%
infection 2.47%
program 2.47%
season 2.47%
activity 1.85%
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