Seven people who tested positive for COVID have died over the past 24 hours, including a woman in her 70s, a woman in her 80s, four women in their 90s and a man in his 80s.

Of those hospitalised, 206 people have received three or more vaccine doses, 88 people are either unvaccinated or partially vaccinated and 60 have an unknown vaccination status.

Just under 94 per cent of eligible South Australians aged 12+ have received at least two vaccine doses.

Boosters have been administered to 74 per cent of eligible South Australians and 69.7 per cent of South Australians aged 16+.

SA Health reports there are now 30,525 active cases in South Australia.

It comes as Professor Nicola Spurrier, who is currently isolating at home with COVID, said that although modelling indicated the peak of the current infection wave would arrive this week, new sub-variants meant that was uncertain.

“The reason for that is we’re having this BA. 4 and BA. 5 wave at the same time as the rest of the world and the rest of Australia, so we don’t have the benefit as we did previously with our modelling to see what happened elsewhere,” Spurrier told ABC Radio on Thursday.

“If we’re looking at the modelling it would suggest that we’re going to have the peak some time this week but of course we’ll only know that next week really.”

The latest genome sampling of South Australian cases found 20.7 per cent of samples analysed were BA.2, 18 per cent of samples were BA.4 and 56.7 per cent were BA.5 or a related variant.