Africa to be declared free from wild polio

The World Health Organisation (WHO) is set to certify on Tuesday that the African continent is free from wild polio, four years after the last cases appeared in north-eastern Nigeria. "Thanks to the relentless efforts by governments, donors, front line health workers and communities, up to 1.8 million children have been saved from the crippling lifelong paralysis," the WHO said in a statement. The official announcement is due on Tuesday afternoon in a videoconference with WHO director-general Tedros Adhanom Ghebreyesus and key figures including philanthropist and Microsoft founder Bill Gates. "Happiness is an understatement. We've been on this marathon for over 30 years,"...