SOUTH AFRICA'S National Institute for Communicable Diseases reported 10,017 new COVID-19 cases, the first day since January the institute has reported more than 10,000 new infections. Health authorities have warned South Africa may be entering a fifth wave of infections driven by the BA.4 and BA.5 Omicron sub-variants. South Africa has recorded the most coronavirus cases and deaths on the African continent and only exited a fourth wave in January. Experts had predicted a fifth wave could start during the southern hemisphere winter months, sometime in May or June. Just under 50% of South Africa's adult population of roughly 40…