A new vaccine has been created to deal with the increasing cases of monkeypox virus. Seven hundred and twenty-eight individuals were vaccinated with the new virus and two thousand one hundred and seventy-two individuals, who did not receive the vaccine, were followed for a four-year period. At the end of the four years, 241 of those vaccinated reported developing a monkeypox infection. With the unvaccinated group there were 695 cases of monkeypox during the four-year period.
What type of study is this?
Construct a 2×2 table to organize the data.
Calculate and interpret an appropriate measure of association for this study.
Is this vaccine an effective control mechanism for monkeypox based on the results of this study?

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