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    Approval of Anthrax Vaccine Under FDA’s Animal Rule is a Step Forward, Researchers Argue

    Although the US Food and Drug Administration’s (FDA) 2015 approval of the vaccine BioThrax for postexposure prophylaxis (PEP) for inhalational anthrax wasn’t the first approval under the rarely used Animal Rule, researchers in Nature explained on Thursday why it is a “significant step forward” in the approval of new vaccines and other medical countermeasures under the pathway. Background The Animal Rule pathway (codified here ) was designed to allow companies to bri...