Why are Covid vaccines going to waste?

In the fight against Covid-19, every vaccine counts.And yet, both Malawi and South Sudan say they might destroy as many as 70,000 doses of the Oxford-AstraZeneca jab.The World Health Organization pleaded with them not to.So what exactly is behind their plan? And what does it tell us about Africa’s struggle to immunise more than a billion people?Hosted by Alan Kasujja (@Kasujja on Twitter)#AfricaDaily