Visit to get our entire library of TED Talks, transcripts, translations, personalized talk recommendations and more. In 2014, the world avoided a horrific global outbreak of Ebola, thanks to thousands of selfless health workers -- plus, frankly, thanks to some very good luck. In hindsight, we know what we should have done better. So, now's the time, Bill Gates suggests, to put all our good ideas into practice, from scenario planning to vaccine research to health worker training. As he says,
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