Demographer Simon Kuestenmacher says Sydney’s geography means there is always the potential for a more "localised" approach when it comes to lockdown.
“Sydney isn’t as interconnected as Melbourne is, so there are always opportunities for more localised approaches in Sydney,” Mr Kuestenmacher told Sky News host Chris Kenny.
He said due to the city’s layout there would always be “pockets” which are “absolutely safe”.
"The Northern Beaches approach was actually a rather smart approach because you have pockets in Sydney that you can lock down in a more isolated way.
“But it’s too hard for a state to manage a very localised approach … it’s easier for a government, funnily enough, to lock down everyone.”