Ozone & face masks w/carbon?

Hi all. I had not paid attention to what can be done about outdoor ozone exposure til recently when I seem to be flaring a lot. Not qualifying as exacerbations, no bacterial infections besides the MAC I'm being treated for. Then I realized we are have a lot of high ozone days here in NYC. So 2 questions for our wonderfully helpful folks here:
1. How do you know if you are "especially sensitive to ozone" (warranting paying attention to ozone levels before going out, per air quality alerts)? Vs any of the other variables that can affect our breathing? And
2. Has anyone tried the face masks with a carbon layer which is the one thing that protects against ozone?
Thanks all for the generous sharing of experience here.