Moderna announced that it plans to file with the FDA Monday for an emergency use authorization for its coronavirus vaccine, which the company said has an efficacy rate of 94.1%. Why it matters: Moderna will become the second company to file for a vaccine EUA after Pfizer did the same earlier this month, potentially paving the way for the U.S. to have two COVID-19 vaccines in distribution by the end of the year. The company said its vaccine has a 100% efficacy rate against severe COVID cases.