Patient zero: Back from the brink

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<p>A six-year old boy in Papua New Guinea woke up one day in 2018 and was suddenly unable to stand up. Less than a year later, children in three other Asia Pacific nations were experiencing the same alarming symptoms. </p><p>A disease that had been thought to have been eradicated from this region 18 years before was back -- and it appeared to be spreading. Olivia Willis tells the story of how doctors discovered that these children who developed paralysis had in fact contracted polio.</p><p>Producers: Jane Lee, Cheyne Anderson Senior Producer: Carl Smith Executive Producer: Joel Werner Sound Design: Tim Jenkins</p><p>An ABC Science Unit. ABC Radio National and BBC World Service co-production.</p><p>Picture: Child receiving a polio vaccination from health worker at a mobile clinic on a street in Mount Hagen in the Western Highlands, Credit: Peter Parks/AFP/Getty Images</p>