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Latest in Omicron sub-lineages ‘likely to bypass vaccines’ and natural immunity
New Omicron sub-lineages, discovered by South African scientists this month, are likely able to evade vaccines and natural immunity from prior infections.
That’s according to the head of gene-sequencing at the units that produced a study on the strains.
The BA.4 and BA.5 sub-lineages appear to be more infectious than the earlier BA.2 lineage, which itself was more infectious than the original Omicron variant, said Tulio de Oliveira, the head of the institutes at the universities of KwaZulu-Natal and Stellenbosch.
With almost all South Africans either having been vaccinated against the coronavirus or having had a prior infection, the current surge in cases means the strains are more likely to be capable of evading the body’s defences rather than simply being more transmissible, Mr de Oliveira said.
(...)
The new sub-lineages account for about 70pc of new coronavirus cases in South Africa, Mr de Oliveira said in a series of Twitter postings.
“Our main scenario for Omicron BA.4 and BA.5 is that it increases infections but that does not translate into large hospitalisations and deaths."
(...)
“It is not clear whether South Africa has entered the fifth wave of the virus, but the numbers suggest that we are on the brink of one,” South African health minister Joe Phaahla told the press yesterday.
(...)
“What is clear is that we are still at great risk of Covid-19, especially as we go into a very long winter,” Mr Phaahla said.
Waasila Jassat, a public health specialist at the National Institute of Communicable Diseases, said on the call that while hospitalisations are rising, there is yet to be a significant increase in deaths.
“Increases have been recorded among all age groups, but the highest number of cases are currently in the 10- to 14-year-old age groups,” she said.
(...)
“There is quite a lot of diversity in this Omicron family of lineages,” Richard Lessells, an infectious disease specialist at the KRISP genomics institute, said.
"This could explain why the newly identified sub-lineages are causing an upsurge in infections.”
New Omicron sub-lineages, discovered by South African scientists this month, are likely able to evade vaccines and natural immunity from prior infections.
That’s according to the head of gene-sequencing at the units that produced a study on the strains.
The BA.4 and BA.5 sub-lineages appear to be more infectious than the earlier BA.2 lineage, which itself was more infectious than the original Omicron variant, said Tulio de Oliveira, the head of the institutes at the universities of KwaZulu-Natal and Stellenbosch.
With almost all South Africans either having been vaccinated against the coronavirus or having had a prior infection, the current surge in cases means the strains are more likely to be capable of evading the body’s defences rather than simply being more transmissible, Mr de Oliveira said.
(...)
The new sub-lineages account for about 70pc of new coronavirus cases in South Africa, Mr de Oliveira said in a series of Twitter postings.
“Our main scenario for Omicron BA.4 and BA.5 is that it increases infections but that does not translate into large hospitalisations and deaths."
(...)
“It is not clear whether South Africa has entered the fifth wave of the virus, but the numbers suggest that we are on the brink of one,” South African health minister Joe Phaahla told the press yesterday.
(...)
“What is clear is that we are still at great risk of Covid-19, especially as we go into a very long winter,” Mr Phaahla said.
Waasila Jassat, a public health specialist at the National Institute of Communicable Diseases, said on the call that while hospitalisations are rising, there is yet to be a significant increase in deaths.
“Increases have been recorded among all age groups, but the highest number of cases are currently in the 10- to 14-year-old age groups,” she said.
(...)
“There is quite a lot of diversity in this Omicron family of lineages,” Richard Lessells, an infectious disease specialist at the KRISP genomics institute, said.
"This could explain why the newly identified sub-lineages are causing an upsurge in infections.”