Wits resumes COVID-19 vaccine trials

The University of the Witwatersrand has resumed participation in the Oxford COVID-19 vaccine trial currently underway. The trials were suspended when one participant in the UK experienced what officials call a medical event. Details of that incident cannot be divulged due to patient confidentiality. Professor of Vaccinology with the University of Witwatersrand Shabir Madhi joins us now to discuss South Africa's participation.