Polio is a highly contagious disease that affects the nervous system and it is caused by the poliovirus, which is spread through contact with contaminated water or faeces.
Tapiwa ChirumeSTAFF WRITERchirumet@dailynews.co.zwGOVERNMENT, with the support of the World Health Organisation (WHO) and the Gates Foundation, has established an environmental surveillance unit...
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