TIM COCKS SOUTH Africa has approved China's Sinovac vaccine against COVID-19, the acting health minister has announced, as the country faces a crippling third wave of infections that has paralysed hospitals and brought its death toll to 60,000. "I would like to express gratitude to our regulatory authority for their sense of urgency, which included reducing turnaround time to process applications for registration of ... (the) COVID-19 vaccine," Mamoloko Kubayi said in a statement. The surge in infections in Africa's most industrialised nation has overwhelmed hospitals, especially in the main city of Johannesburg, and left overworked healthcare personnel struggling to…