Sydneysiders face another four weeks in lockdown, as health authorities desperately try to bend the curve of coronavirus infections.

While there has been some tightening of restrictions, epidemiologists remain skeptical it'll achieve a decline in caseloads anytime soon.

Restrictions are tighter in eight of Sydney's local government areas, which were expanded to include Parramatta, Campbelltown and Georges River where people can't leave unless for very specific work.

So on today's Coronacast, will four more weeks be enough? Or in a month, could we be in the same place we are now?