Generally foreign contaminants introduce chronic immune responses. A rise in autoimmune disorders could potentially be a result. Or perhaps a single particle ha

Generally foreign contaminants introduce chronic immune responses. A rise in autoimmune disorders could potentially be a result. Or perhaps a single particle has a small chance of inducing cancer in a cell that endocytically engulfs it. In a situation like these the effects of low numbers will be small and hard to attribute to the source but that doesn’t mean it won’t continue to make it much worse for us.