JOHANNESBURG - An increase of SARS-COV-2 RNA has been spotted in Limpopo, the Western Cape and the Eastern Cape.
SARS-COV-2 is the virus that causes Covid-19.
It's a cause for concern as it comes after months of calm.
The spike was picked up by the Medical Research council's Wastewater Surveillance Programme.
It's noticed week-on-week increases.
"After months of relative calm, we suddenly started seeing a sharp increase in the concentration of SARS COV-2," said Prof Angela Mathee.
"Initially in Cape Town last week there was a sharp increase in the concentration, especially in the treatment plant."
Watch the full interview in the video below.