Prof Madhi on whether you can get reinfected once you've had Covid-19?

Vaccines are the talk of the town, but what about the natural immunity (or lack thereof) enjoyed by those who have suffered through Covid-19 disease? And what about those who were infected but asymptomatic? Do they have any antibodies to speak of? And what about immunity against the new variant if you got sick in the first wave? And is an antibody test even worth getting?
In this podcast, Sunday Times senior science reporter Tanya Farber digs into some of these questions with the esteemed Professor Shabir Madhi, a global leader in infectious diseases and a vaccinologist at Wits University where he is dean of health sciences. Prof Madhi has also been instrumental in Covid-19 clinical trials taking place in the country.