Each of the following except _______ influenced the decline of mortality in the United States prior to World War II.
A) improved diet
B) better hygiene
C) availability of penicillin
D) availability of smallpox vaccinations

Question

Quizplus · Accepted Answer

The availability of penicillin did not influence the decline of mortality in the United States prior to World War II because penicillin was not widely available until after the war. Improved diet, better hygiene, and the availability of smallpox vaccinations were significant factors in reducing mortality rates before World War II.

Each of the Following Except _______ Influenced the Decline of Mortality