Word: development
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Dates: during 1980-1989
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Although the agents of all these infections remained a mystery, the first safe vaccine against a viral disease was developed in the 18th century by Edward Jenner, a doctor in rural England. Jenner noticed that farmhands who contracted cowpox, a mild disease related to smallpox, did not develop the more deadly disease. In 1798 he inoculated a boy with material from a milkmaid's cowpox sore, then demonstrated that the lad had developed immunity to smallpox...
...infants, as many newborns in China, Southeast Asia and Africa are, almost always become lifelong carriers. "The virus doesn't do much damage for a long time," says Jesse Summers of the Fox Chase Cancer Center in Philadelphia, "but then, after 20 or 30 years, chronic liver problems develop." Papillomaviruses, which cause warts, may also take up permanent residence in the body, biding their time in skin cells...
...results of the pair technique are often suprising, Selman said. "Over a long period of time, the kids begin to develop other strategies. Shy kids often become more self-assured, and the kids learn the importance of collaboration," he added...
Marquand said the Council discussed how todivide the purview of the two bodies for nearly anhour and a half but failed to develop a clearconsensus...
Such individuals obviously live under a dark cloud of medical uncertainty; how many of these individuals will go on to develop AIDS or AIDS Related Complex (ARC) is currently unknown. The latency period between infection and disease, though still not precisely known, can be at least as long as five years...