We track four people on their journey.
Zika virus: 'We have more questions than answers'
26 Aug 2013 12:36 GMT | Africa, Somalia
Six years after Somalia was declared free of polio, the disease is back.
Just this week doctors have treated 20 new cases, raising the total number of victims to 80.
Al Jazeera's Mohammed Adow reports from Mogadishu.
Source: Al Jazeera
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