Health officials are bracing for a potential Covid-19 outbreak after a Sydney man with a "high viral load" visited 14 suburbs over five days.
Premier Gladys Berejiklian and chief health officer Dr Kerry Chant announced the news yesterday afternoon - putting at least 19 venues across the city's north, east and west on alert.
Global biosecurity and infectious disease expert, the University of NSW's Professor Raina MacIntyre, said the next two weeks will be critical in knowing "if the virus' spread is growing or not".
"It is worrying because it's unknown where this man acquired this infection. Who did they get infected from? That's the real question of interest."