Between 1900 and 2000, the crude infectious disease mortality rate in the United Statesa. declined by about 50%b. remained unchangedc. declined by about 90%d. increased slightly due to the emergence of HIV infections
declined by about 90%
a. declined by about 50%.
Between 1900 and 2000, the United States has made significant progress in reducing crude infectious disease mortality rates. Factors such as improved sanitation, development of vaccines and antibiotics, public health campaigns, and advancement in medical technologies have been contributing to this decline. According to the Centers for Disease Control and Prevention (CDC), the infectious disease mortality rate in the United States declined by about 50% from 1900 to 2000. Despite this decline, some infectious diseases continue to pose a significant public health threat, and the CDC continues to monitor and respond to emerging infectious diseases to ensure the health and well-being of the population.
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