Where did they find a cancer patient undergoing chemotherapy to prove this on? Chemo has by itself damn near killed everyone I know who had to do it. I haven’t met any who wanted to hang with a bunch of smokers. I’m glad I got through prostate cancer with radiation. I also didn’t feel like sex or a cigarette when it was over.
chemo is a dicey form of treatment. I’m familiar with the post-surgical treatments going back to the 70s, and the improved pre-surgical chemo cocktails that arrived after year 2k.
Regarding the 2nd hand smoke, not only is the concentration/ppm significant but also the general stress of the environment. For example, it may not be the smoke, but instead the interpersonal dynamics of the patient and the smoker. Or a combination of both. It would be interesting to know the related cancer rates that precipitated the chemo. There’s also the data dimension where the patient is isolated from the existing environment, and another dimension where the patient is isolated but also subject to similar particulates.