> Improved sanitation, refrigeration, insights into adequate nutrition, and other improvements in technology have done just as much as vaccination to vanquish t

> Improved sanitation, refrigeration, insights into adequate nutrition, and other improvements in technology have done just as much as vaccination to vanquish the diseases of antiquity. I don't understand the relevance. Will sanitation, refrigeration, or nutrition protect you from polio, measles, or other diseases commonly vaccinated against?