Health is something we tend to (1) ___when we have it. When our body is doing well, we are hardly (3)____of it. But illness can come, even (2)______we are young. In fact, childhood has been a very susceptible time. Many diseases attack children in particular, and people know very little (4)______ to cure them once they struck. The result was that many children died. About a century ago, (5)__________, scientists found out about germs, and then everything changed. The (6)_____ of many diseases was found, and cures were developed. As this medical discovery spread, the world became (7)______ safer for children. The result is that (8)___________a hundred years ago, the average man lived for 35 years, nowadays, in many areas of the world, people can (9)______ to live for 75 years. And what do we expect by the year 2020 ? Undoubtedly, medical science will continue to (10)______ . Some people will be able to avoid medical problems that are unavoidable today.
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