Thanks to the general availability and utilization of vaccines against smallpox and polio, massive improvements in sanitation and emergency response, and long-t

Thanks to the general availability and utilization of vaccines against smallpox and polio, massive improvements in sanitation and emergency response, and long-term cardiac therapy, the death rate due to cancers is radically up. Cancer is a horrible disesase. Which one of those changes should we not have made to end up in the situation we're in today?