It looks like it'll be this way for several days yet. The BOM optimistically forecasts that the haze will clear from Monday, but they've been saying that for the last fortnight - that it'll clear in 2-3 days - and it hasn't yet. It's been making me feel a bit nauseated and sleep quite poorly.
I've sealed up my place fairly well, including taping plastic over the gas wall furnace, which was acting as a big inlet for smoke.
Plus, I made a DIY air purifier. Take a cheap 30cm box fan, some plastic sheet, gaffer tape and a spare car cabin filter I had lying around, and, voila, a very basic air purifier is the result.
Given the makeshift nature, and that it makes air more breathable, I've dubbed it the "Apollo 13":
https://i.ibb.co/DL1rzFk/DIY-1.jpg https://i.ibb.co/pQm69Ww/DIY-2.jpg
I'm going to run it over night in the bedroom and see if it makes any appreciable difference.