ROCKVILLE, Md.--(BUSINESS WIRE)--Emergent BioSolutions Inc. (NYSE:EBS) announced today that the Department of Health and Human Services (HHS) has reaffirmed its commitment to continue to purchase BioThrax® (Anthrax Vaccine Adsorbed) under the current contract for 18.75 million doses that provides for a firm fixed price of $400 million plus an additional $34 million upon receipt of regulatory approval of four year dating. In a recent notification, HHS stated the following: