Do you feel that reconfiguring his design would have reduced or eliminated any of these threats?

Learning Goal: I’m working on a english question and need an explanation and answer to help me learn.Read the article “The Salk polio vaccine: ‘Greatest public health experiment in history’” and answer the questions below. Q1 The Salk polio vaccine experiment was a field experiment. If you wanted to perform a similar experiment with a different vaccine today, would you use the field experiment method or another method? Why? Q2 What are the threats to the validity of Salk’s experiment? Do you feel that reconfiguring his design would have reduced or eliminated any of these threats? If so, how? If not, why not?

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