Each vial contains 1 mL of extractable vaccine. The product should be stored at ≤ -60°C until ready for use. Manufacturer ImmunityBio (previously NantCell) 14.1.3 Source The manufacturing department of ImmunityBio (previously NantCell) will supply each vaccine in 2-mL single-dose vials. Each single-dose vial contains a sterile, clear suspension of the ETBX vaccine at 5 x 1011 VP per 1 mL intended for single dose administration and contains ARM formulation buffer (20 mM TRIS, 25 mM NaCl, 2.5% glycerol, pH 8.0). Upon receipt of the investigational product, the Investigator or delegated designee will verify that an appropriate shipping temperature was maintained, conduct an inventory, and sign the drug receipt form and send a scanned copy to the Sponsor contact as designated on the form.