The COVID-19 vaccine from Moderna Therapeutics is 94.1 percent effective at preventing infection from the coronavirus that causes the illness, according to the Food and Drug Administration's (FDA) staff analysis. This efficacy rate was calculated based on the finding of 11 COVID-19 cases in the vaccine group and 185 COVID-19 cases in the placebo group. Additional good news is that 11 cases of severe COVID-19 occurred in the placebo group whereas none occurred in the vaccine group. Furthermore, the report notes that the vaccine was similarly efficacious for all "age groups, genders, racial and ethnic groups, and participants with medical comorbidities [like obesity and diabetes] associated with high risk of severe COVID-19."
