On this edition of Africa 54: experts say South Africa is seeing growing drug addiction among young people during the pandemic;. Nigeria has been hit by a surge in cholera cases in recent weeks, focused on the country's north and adding to a public health crisis accompanied by a rise in COVID-19 cases; And Madagascar has arrested 21 more suspects, including 12 military personnel, in connection with a plot to kill President Andry Rajoelina and topple the government.