It was another record day yesterday for NSW in COVID-19 cases, and the wave is showing no signs of slowing down.

And yesterday in even more grim news, the Premier Gladys Berejiklian flagged that October would be the worst month for hospitals and ICU units.

That's despite the vaccination rate in NSW charging ahead thanks to a population rushing forward to be vaccinated and additional supply helping things out.

So on today's Coronacast, why is October being tipped to be bad when the vaccine rate is growing so quickly?

Also on today's show:

* What can we learn about long-COVID from the people who've lived with it longest?

* I am confused by the target of 70 to 80 per cent immunisation before opening up. There is a very big difference between 70 and 80. Can you explain please?

* What's the likelihood that our third doses of mRNA vaccine will have been changed to specifically target the Delta variant?