AFRICA is seeing an uptick in COVID-19 infections, largely driven by a doubling in cases reported in South Africa, the World Health Organization said, urging people across the continent to continue to get vaccinated. Africa had been experiencing a lull in COVID cases, with the WHO earlier this month pointing to the longest-running decline in weekly infections on the continent since the start of the pandemic. But last week cases started to pick up in South Africa -- the country that has recorded the most infections and deaths in Africa to date -- and health authorities there are monitoring for…