this question is for people who use air purifiers- not people who don't?

I was wondering if you too have had health problems after getting one and using it for a long time- my friend worked 5 days a week in a small office where they sell them and her boss used them and got sick a lot- after intensive tests they said her heart was weakened by the air purifier- too much ozone is not good for a person-
now she has mini-strokes

this question is for those WHO USE the air purifier
thank you- not someone who hasn’t and just wants to voice their opinion

do you too have the same problem after using one in a small room for a long period of time