With a few digitally driven exceptions, the Covid-19 pandemic is clearly an ill wind that blows no one any good. Whatever country you turn to, whatever community you visit, the harm seems pervasive and often cruelly interlinked.

Look at Guinea-Bissau in West Africa, one of the world’s poorest countries with a population of just 1.9 million. Around 86 per cent of its families rely on a single export crop – cashew nuts. Guinea-Bissau and a tiny handful of impoverished West African neighbours…