Which of the following dramatically reduced death rates due to infectious diseases during the 20th century?

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Vaccinations helped prevent infectious diseases from spreading, antibiotics helped fight infections, and better sanitation prevented the spread of germs, all of which contributed to the decline in death rates from infectious diseases during the 20th century. Access to healthcare, health insurance, and better trained physicians can certainly help in the prevention and treatment of diseases, but these factors alone did not have as significant an impact on reducing death rates as the three factors mentioned in choice C. Economic wealth, improvements in medicine, and the automobile are not directly related to reducing death rates from infectious diseases. Better nutritional foods are important for overall health, but alone did not contribute to the significant decline in death rates due to infectious diseases during the 20th century.

Which of the Following Dramatically Reduced Death Rates Due to Infectious