Which Two Scientists Developed a Vaccine That Brought Polio Under

question 54

Multiple Choice

Which two scientists developed a vaccine that brought polio under control?

• A) Helen Taussig and Alfred Blalock
• B) Albert Sabin and Jonas Salk
• C) Alexander Fleming and Howard Florey
• D) Walter Reed and Sir Frederick Grant Banting

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Definitions:

Lower-middle-income Economies

Countries classified by the World Bank based on gross national income (GNI) per capita that are above low-income but below upper-middle-income thresholds.

Upper-middle-income Economies

Nations with a gross national income per capita above a certain threshold set by the World Bank, but below that of high-income economies.

Command Economies

In these economic frameworks, the central authority or government is responsible for making choices about the creation and allocation of goods and services.

Upper-middle-income

A classification of socio-economic status used to describe individuals or families with income levels between the middle class and the affluent.