Health experts in South Africa say the country is experiencing a surge of new COVID-19 cases driven by two omicron sub-variants. Professor Marta Nunes, a researcher at Vaccine and Infectious Diseases Analytics at Chris Hani Baragwanath Hospital in Soweto said that for about three weeks the country has seen increasing numbers of new cases and somewhat higher hospitalizations, but not increases in severe cases and deaths. South Africa’s new cases have gone from an average of 300 per day in early April to about 8,000 per day this week. Nunes says the actual number of new cases is probably much higher but because the symptoms are mild, many people are not getting tested.