Biological carcinogens include infections from certain viruses, bacteria, or parasites. "The incidence of cancer rises dramatically with age, most likely due to a build-up of risks for

specific cancers that increase with age," the WHO added. "The overall risk accumulation is combined with the tendency for cellular repair mechanisms to be less effective as a

person grows older." While cancer did eventually lead to Wayne's death, he could have died much sooner if his cancerous lung was not removed. Biological carcinogens include

infections from certain viruses, bacteria, or parasites. "The incidence of cancer rises dramatically with age, most likely due to a build-up of risks for specific cancers that increase