So far this year, only nine polio cases have been reported in the entire world. By this time next year, the World Health Organisation predicts that number will finally reach zero. Polio would become only the second human disease we've ever wiped from the planet. And it has taken an incredible global public health collaboration to get here. In the course of just two weeks starting April 17, the entire world is going to do something remarkable: 150 countries are going to switch from one kind of polio vaccine to another. http://www.sciencealert.com/this-co...te-one-of-the-most-tragic-diseases-in-history
