JOHANNESBURG - As government scrambles to step up its vaccination drive, a COVID-19 fourth wave could be on its way.
Only three million South Africans are fully vaccinated.
The Health Department's Nicolas Crisp says that the timing of the first three waves could mean we are in for another in October and November.
National Institute of Communicable Disease's Prof Adrian Puren said: "We always have variants. I think it's the variants that are critical, in terms of transmissibility, pathogenicity, as well as immune evasion."
Professor Puren said surveillance of the progress of the virus is important.