www.cbsnews.com/news/mutant-polio-virus-spreads-in-nigeria/So when WHO officials discovered a polio outbreak in Nigeria was sparked by the polio vaccine itself, they assumed it would be easier to stop than a natural "wild" virus.
They were wrong.
In 2007, health experts reported that amid Nigeria's ongoing outbreak of wild polio viruses, 69 children had also been paralyzed in a new outbreak caused by the mutation of a vaccine's virus.
Back then, WHO said the vaccine-linked outbreak would be swiftly overcome - yet two years later, cases continue to mount. They have since identified polio cases linked to the vaccine dating back as far as 2005.
My friend buys two 1.25litre bottles for 5 bucks at garage and gives the spare one to me for free,so only if i get for free.