Article "The Salk polio vaccine: 'Greatest public health experiment in history'" 

Questions
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?

Answer rating: 100% (QA)

The Salk polio vaccine trials conducted in the 1950s were groundbreaking and played a vital role in eradicating polio However like any experiment they ... View the full answer