South African scientists have detected a new COVID-19 variant in small numbers, which is worse than the Delta variant.
They blame it for a surge in infection numbers. Daily infections shot to more than 1,200 cases on Wednesday, from around 100 earlier this month, raising fears of a fourth wave of the pandemic.
The variant – called B.1.1.529 – has a “very unusual constellation” of mutations, which are concerning because they could help it evade the body’s immune response and make it more transmissible, scientists said.
Early signs from diagnostic laboratories suggest the variant has rapidly increased in the most populated province of Gauteng and may already be present in the country’s other eight provinces, they said.
“Unfortunately, we have detected a new variant, which is a reason for concern in South Africa,” virologist Tulio de Oliveira told a hastily-called news conference.
South Africa has confirmed around 100 specimens as B.1.1.529, but the variant has also been found in Botswana and Hong Kong, with the Hong Kong case a traveller from South Africa. As many as 90 per cent of new cases in Gauteng could be B.1.1.529, scientists believe.
The first cases of the variant were collected in Botswana on November 11, and the earliest in South Africa was recorded three days later. The case found in Hong Kong was a 36-year-old man who had a negative PCR test before flying from Hong Kong to South Africa, where he stayed from October 22 to November 11. He tested negative on his return to Hong Kong, but tested positive on November 13, while in quarantine.
“Although the data are limited, our experts are working overtime with all the established surveillance systems to understand the new variant and what the potential implications could be,” South Africa’s National Institute for Communicable Diseases said in a statement.
The country has requested an urgent sitting of a World Health Organisation (WHO) working group on virus evolution today (Friday) to discuss the new variant.
Health Minister, Joe Phaahla, said it was too early to say whether the government would impose tougher restrictions in response to the variant, adding that the variant was of “serious concern” and behind an “exponential” increase in reported cases.
South Africa has the highest pandemic numbers in Africa, notching up around 2.95 million cases, of which 89,657 have been fatal.
South Africa was the first country to detect the Beta variant last year. Beta is one of only four labelled “of concern” by the WHO because there is evidence that it is more contagious and vaccines work less well against it. The country detected another variant, C.1.2, earlier this year, but it has not displaced the more common Delta variant.
