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In a world of near-constant innovation and disruption, the definition of a great boss (or leader or manager) may be the one thing that doesn't require reinvention. This is the fourth in a series excerpted from a new chapter in the paperback version of Good Boss, Bad Boss , a New York Times best-seller by Robert Sutton . Read the three other installments here .

Dengue fever affects 50 million people, with no cure in sight. But maybe prevention could work instead: Scientists have found a way to get mosquitoes sick with a bacteria that prevents them from carrying the disease.