A male condom that is more fun to use than not using one at all is the latest engineering challenge posed by the Grand Challenges in Global Health, supported by the Gates Foundation, which sees significant promise for public health. "It may seem obvious, but the success and impact of any public health tool hinges on that tool being used consistently and correctly by those who need it ... The potential value of condoms is limited by inconsistent use," the foundation said in a statement.

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