Phaahla said while it is not yet clear if South Africa has entered the fifth wave, the numbers suggest that we are on the brink of one.
Clinical infectious diseases epidemiologist Prof Salim Abdool Karim said the next seven days will determine whether South Africa, is in fact, entering a fifth wave of Covid-19 infections.
“We can only say we are in the fifth wave when there is a sustained 7-day period of more than 6 237 cases per day,” Phaala said.
He added that Easter and other religious holidays could have resulted in a spike in infections, and the health department will need to monitor infection numbers over the next two weeks.
Phaahla urged South Africans not to let their guard down and to vaccinate ahead of winter as people will be spending more time indoors which increases the risk of spreading the virus.
Is there a new variant?
Phaahla said scientists have only confirmed the sub-variants of Omicron being the BA.4 and the BA.5, but not enough to be defined as variants of concern because the changes are not that significant.
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“There is some evidence that these new lineages are replacing the previous dominant lineage, BA.2. The new lineages account for half of the cases since early April,” he said.
Dr Lessells said the waning immunity against Covid-19 infection may also be contributing to the resurgence of new infections.
He emphasized that key public health measures against all variants is and will always be vaccination to prevent severe disease.