Comment by docdendrite

That is a dubious claim. While links between HPV and cervical cancer are quite strong and well-defined, the associations with the other viruses you cite are only correlative. Also, Hep C, HIV and herpes have no vaccine, so unclear what your statement is referring to anyway? What has contributed to a drop in cancer mortality would be advances in treatment (like targeted therapies and immunoncology), better image/blood/genetic screening practices, and certainly the decreased popularity of smoking.