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A study investigated the association between consistent use of a face mask in indoor public settings and a positive SARS-CoV-2 test results. The results are

A study investigated the association between consistent use of a face mask in indoor public settings and a positive SARS-CoV-2 test results. The results are presented in the table below. What is the odds ratio? SARS-CoV-2 + SARS-CoV-2 - Mask 150 187 337 No mask 20 10 30 170 197 367 Question 15 options: 0.40 0.37 0.84 0.27

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