Nationally, there are about 7,400 hospitalised Covid patients. Biostatistician Lise Jamieson, a senior researcher at the Wits Health Economics & Epidemiology Research Office, said the trend was worrying.
"Daily hospital admissions have increased substantially in five provinces, with some nearing the peak numbers of the second wave," she said.
By Friday night, only 1,210,258 people had received a single dose of a Covid-19 vaccine since the national launch on May 17, apart from the 479,768 health workers fully vaccinated under the Sisonke study.
The rollout is constrained by the availability of Pfizer/BioNTech doses, coming into SA in batches of 636,000 every two weeks.
A spokesperson for the health ministry, Lwazi Manzi, said: "All the doses delivered by Pfizer to date have been distributed.
"The last shipment did not need clearance because it belonged to a batch that was already cleared.