No, I do not remember that. I'm pretty sure you just made it up. Air filtering is obviously long-studied, and if you are alluding to COVID-era events I seem to recall that one of the first large-scale responses that happened in my region was the subway operator installed up-rated HEPA+UV air cleaners on every car.

If you want to sustain this claim, show us the process by which someone's career was truncated by researching air filtration.