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More people die of tuberculosis (结核病) than of any
other disease caused by a single agent. This has probably
been the case in quite a while. During the early stages of S1. ________
the industrial revolution, perhaps one in every seventh S2. ________
deaths in Europe's crowded cities were caused by the S3. ________
disease. From now on, though, western eyes, missing the S4. ________
global picture, saw the trouble going into decline. With
occasional breaks for war, the rates of death and
infection in the Europe and America dropped steadily S5. ________
through the 19th and 20th centuries. In the 1950s, the
introduction of antibiotics (抗菌素) strengthened the
trend in rich countries, and the antibiotics were allowed
to be imported to poor countries. Medical researchers S6. ________
declared victory and withdrew.
They are wrong. In the mid-1980s the frequency of S7. ________
infections and deaths started to pick up again around the
world. Where tuberculosis vanished, it came back; in S8. ________
many places where it had never been away, it grew better. S9. ________
The World Health Organization estimates that 1.7
billion people (a third of the earth's population) suffer
from tuberculosis. Even when the infection rate was
falling, population growth kept the number of clinical
cases more or less constantly at 8 million a year. Around S10. ________
3 million of those people died, nearly all of them in poor countries.
