Earlier this week, the World Health Organization declared that the recent spread of polio met the conditions for a public health emergency.
That’s an unusual step. The last time WHO declared a public health emergency was in 2009 due to the spread of H1N1 flu (often known as swine flu).
So, what does this emergency mean? Are we still on track to maintain the remarkable progress we've made in the fight to eliminate polio worldwide by 2018? View the slides below to learn more.