Prior to the 20th century,death by heart disease or cancer was dramatically low.Which of the following was a major contributing cause?

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Prior to the 20th century, infectious diseases were a major cause of death and people had a shorter life expectancy. This meant that not as many people lived long enough to develop chronic illnesses such as heart disease or cancer. As medical advancements improved and infectious diseases were better controlled, people began living longer and chronic illnesses became more prevalent.

Prior to the 20th Century,death by Heart Disease or Cancer