The FDA has defended its decision to issue a refusal-to-file (RTF) letter for Moderna's new mRNA-based influenza vaccine, claiming the company had not used an appropriate control group in its pivotal ...

Mary Hall is a editor for Investopedia's Advisor Insights, in addition to being the editor of several books and doctoral papers. Mary received her bachelor's in English from Kent State University with ...

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Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Thomas J. Brock is a CFA and CPA with more ...