I read your reply and read your profile and try not to think it's merely a miracle and you are the one who is fortunate. My aunt started to get chemo two weeks ago, but she decided not to go through surgery. However, I will believe in you that air purifier has an important role and get more Clair air filter for her just in case.
Please tell me more about your conditions. And the other two cancers you have battled since 2009.