I beg to differ

I beg to differ.  Actually, I never asked for proof that viruses cause cancer, but rather proof of your opinion that "the vast majority of cancers are caused by viruses".  Regardless of how many studies you may produce regarding links between viruses and cancer, any search in any search engine for "cancer causes" clearly demonstrates that the idea that "the vast majority of cancers are caused by viruses" is at best a distinctly minority opinion.

BTW, where is the proof of your recent statement which maintained that I was banned from your forum for "constantly making attacks and starting debates in violation of TOS".  As I pointed out in response to that false accusation, I only ever made two posts which originated in your forum, which anyone can see by going to your forum and searching for "Dquixote1217".