Contact tracing of Gauteng students who attended the Matric Rage 2020 event in Kwazulu-Natal is under way. Gauteng Health Department says over one 1,300 matrics from Gauteng attended the event in Ballito on KZN's North. A number of those who attended have since tested positive for COVID-19. Harry Moultrie senior research epidemiologist at the National Institute for Communicable Diseases, discusses this. Courtesy #DStv403