Human challenge studies

Human challenge studies have become a critical topic as the world is facing Covid19 and trying to find a solution as quickly as possible. However, there are many ethical dilemmas. Please read
https://utah.instructure.com/courses/666964/files/112157142?wrap=1 or https://www.nature.com/articles/d41586-020-02821-4
and answer the following questions in your original post: Why do researchers need a challenge study? How is a challenge study different from a traditionally designed study? What are the major ethical dilemmas that you see? Which ethical criteria does it potentially violate? In your opinion, does the benefit overweight the potential downside? Why?

Sample Solution