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Though SA is over the peak of its Omicron wave, new infections have stabilised at about 3,000 a day, a higher level than that seen at the tail end of previous waves of Covid-19 infections.
The Omicron BA.2 sub-variant makes up almost 100% of new coronavirus infections in SA, Tulio de Oliveira, a bio-informatics professor who runs gene-sequencing institutions and advises the government on the pandemic, said.
The BA.2 sub-variant of Omicron is now the dominant Covid-19 variant in SA and has been detected in multiple other African countries, the head of the continent's top public health body said on Thursday.
Omicron sub-variant BA.2 found in 5 African countries: WHO scientist
The researchers examined the transmission of Omicron subvariant BA.2 versus BA.1 in 8,541 Danish households and 17,945 household members.