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Ricin toxin may be used as a biological warfare agent and no medical countermeasures are currently available. Here, a well‐characterized lot of ricin was aerosolized to determine the delivered dose for future pre‐clinical efficacy studies. Mouse intraperitoneal (IP) median lethal dose (LD50) bioassay measured potency at 5.62 and 7.35 μg/kg on Days 0 and 365, respectively. Additional analyses included...
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