Study: Has South Africa reached herd immunity?

Last month a pre-print was published that showed COVID-19 antibodies in South Africa had reached remarkably high levels. It was ignored by most of the media, but given the concern over the South Africa variant being “more transmissible” and “evading vaccine immunity” it shouldn’t have been as it gives an indication of what we might expect from the variant. Extrapolating from antibody testing on blood donors, the researchers found antibody levels of 63% in Eastern Cape province (EC), 46% in Free State (FS), 52% in KwaZulu Natal (ZN) and 32% in Northern Cape (NC). These figures were between 15 and 22 times higher than the percentage of the population that had tested positive for the virus to date.