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Influenza（流感）
Influenza has been with us a long time. According to some Greek writers
(5l)medical history,the outbreak 0f 412 B. C. was of influenza. The same has been suggested of the sickness _(52)sweptthrough the Greek army attacking Syracuse in 395 B. C. Influenza is a disease that moves most quicklyamong people living in _ (53)conditions, hence,it is likely to attack armies. _(54)the nineteenth century there were five widespread outbreaks of influenza The last of thefive _(55)in 1889 and marked the beginning of the story of influenza in our time. _(56)therecent outbreak,it started in Asia.
For more than forty years before that outbreak,influenza had steadily . (57)and was be-lieved to be dying out. A new group of outbreaks was _(58)by the great outbreak of 1889-1890 and for the next quarter of a century influenza remained a constant threat.
In April 1918 influenza broke out among American troops stationed in France. It quickly spreadthrough all the _(59)but caused relatively few deaths. Four months later, however, a secondoutbreak started which _(60)to be a killer. It killed not only the old and already sick but alsohealthy young adults. It _(6l)through every country in the world,only a few distant islands inthe South Atlantic and the Pacific remaining _(62). It brought the life of whole countries tostop, food _(63)stopped and work loss was very great. Before the great outbreak ended,it hadkilled at (64)15 million people. Thereafter,there have been several great outbreaks throughout theworld. It is thus _ (65)that influenza is a terrible infection that we have to pay more attention to
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