ICYMI Flutracking is a website which tracks flu-like symptoms throughout flu season.
During January, they ran a survey asking how bushfire smoke affects participants. The results can be found here:
https://info.flutracking.net/wp-content/uploads/2020/02/Bushfire-Smoke-Participant-Report_pdf.pdf
Flutracking will also be starting earlier this year, partly because of coronavirus and partly because the US flu season has been bad. You can sign up here. https://info.flutracking.net/
You get a weekly email, which takes less than a minute to complete (depending on how many people are in your household).