TRACKING SARS-COV-2 VARIANTS
All viruses, including SARS-CoV-2, the virus that causes COVID-19, change over time. Most changes have little to no impact on the virus’ properties. However, some changes may affect the virus’s properties, such as how easily it spreads, the associated disease severity, or the performance of vaccines, therapeutic medicines, diagnostic tools, or other public health and social measures.
The Network for Genomics Surveillance in South Africa (NGS-SA), which includes the National Institute for Communicable Diseases (NICD), KRISP at the University of KwaZulu-Natal (UKZN), University of Cape Town (UCT), Stellenbosch University (SUN), the University of the Free State (UFS), the University of Pretoria, the University of the Witwatersrand (WITS) and the National Health Laboratory Service (NHLS), continue to monitor and assess the evolution of SARS-CoV-2.
This report is based on data collected up to 17 September 2021.
- Delta continues to dominate in all provinces from specimens collected in August.
- Overall diversity of lineages decreased as Delta became dominant.
- Lambda and Mu variants not detected in South Africa.
- Mutated C.1.2 lineage has now been detected in all provinces of South Africa – the frequency of C.1.2 at less than 3% of genomes.