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