Which leads to a simple question: But for the Games, would anyone recommend sending an extra half a million visitors into Brazil right now? Of course not: mass migration into the heart of an outbreak is a public health no-brainer. And given the choice between accelerating a dangerous new disease or not—for it is impossible that Games will slow Zika down—the answer should be a no-brainer for the Olympic organizers too. Putting sentimentality aside, clearly the Rio 2016 Games must not proceed.