Things are pretty dire in NSW.

The extended lockdown in Greater Sydney, the Central Coast, Wollongong and the Blue Mountains has got progressively tougher, and with hundreds of new cases of COVID-19 still popping up, the end date is unclear.

The outbreak started a month ago when an unvaccinated airport limo driver ferrying US air crew caught COVID at work and spread it to Bondi, in Sydney's east.

Since then, the cases have moved, with a focus at the moment on three council areas in Sydney's South West: Fairfield, Liverpool, and Canterbury-Bankstown.

Today on The Signal, with all the numbers still trending in the wrong direction, is the lockdown a failure? And if so, what needs to change?

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Dr Julie Leask, Professor of Public Health, University of Sydney