Surely epidemiologists looking at vaccine exposure and cancer rates would control for age.
I am not hugely concerned about the childhood vaccines causing cancer. But I threw the increase out there as one generational change among many.
Beyond the killed and inactivated pathogens in vaccines, the kind of antigens we evolved to deal with, there are preservatives, adjuvants, biological impurities and other possible contaminants.
I am not at all concerned about that, because that association would have been noticed when we first started vaccinating children two hundred years ago.
I do wonder about the role of past cancer treatments which have saved children who otherwise would have died. Childhood cancers are more likely to be caused by genetic factors than anything else. When all of those people who survive a childhood cancer grow up and have their own children, aren't they passing along the cancer genes that would otherwise have disappeared if they had died as children?
Beyond the killed and inactivated pathogens in vaccines, the kind of antigens we evolved to deal with, there are preservatives, adjuvants, biological impurities and other possible contaminants.
The dose of non-antigen components of the vaccine is so low that I don't worry about them. Biological impurities and trace toxins are a part of every day life. I *would* worry about a vaccine that was not stored properly or which might be contaminated, but there are safeguards to reduce the chance of those events.