https://apnews.com/65f3d58d158daff609624e87b3f92e2c > JOHANNESBURG (AP) — South Africa is seeing a rapid rise in COVID-19 cases driven by yet another version of the coronavirus, health experts say. > Cases had been dropping in the country since February. But a new omicron subvariant that scientists call BA.4 began pushing up cases last week and they have risen rapidly since, said Salim Abdool Karim, who previously advised the government on its COVID-19 response.