ROCKVILLE, MD, November 19, 2007 —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:

HHS plans to continue purchasing BioThrax under the contract, which is for 18.75 million doses; and

HHS is diligently working with the Department of Defense (DOD) and other federal partners, as required by Homeland Security Presidential Directive 21 and recommended by a recent Government Accountability Office report, to address effective stockpile management to meet collective requirements.

“We are pleased that HHS has reaffirmed its commitment to the continued procurement of BioThrax under our recent contract, and we are confident that BioThrax will remain a critical component of our nation’s preparedness efforts,” said Fuad El-Hibri, Chief Executive Officer and Chairman of Emergent BioSolutions.  “Emergent BioSolutions looks forward to continuing our long standing relationship with the U.S. government to protect our military men and women as well as Americans at home.”

In the last few months, the company announced significant progress in achieving its business objectives including:

• the upward revision to its revenue guidance to reflect 2007 full-year revenue growth of between 16% and 18%, and a continued commitment to profitability in 2007, which will represent the sixth consecutive year of full year profitability;

• the signing of a $448 million three-year contract with the HHS that included $400 million for delivery of 18.75 million doses of BioThrax, $34 million upon receipt of regulatory approval of four year dating, and $11.5 million in connection with a post-exposure indication for BioThrax;

• the completion of the first delivery of BioThrax to HHS under the new contract, which generated revenue of approximately $42 million;

• the completion of a clinical study in support of the post exposure prophylaxis indication for BioThrax, which triggered an $8.8 million milestone payment from HHS;

• the receipt of a $9.5 million award from HHS to fund the continued development of the company’s anthrax immune globulin therapeutic candidate; and

• the positive completion of a double-blind, placebo-controlled Phase II clinical trial of its single-dose, oral typhoid vaccine candidate in a pediatric population, with the vaccine being well-tolerated and immunogenic.

“These developments demonstrate consistent progress during 2007 towards expanding our business and achieving long-term growth,” he continued. “The HHS contract provides us with a baseline of revenue sufficient to support the growth and profitability of our company in 2008 and 2009, and we intend to expand our revenue sources, including with the Department of Defense, other domestic customers, and internationally with foreign governments based on projects we have been actively pursuing while remaining fiscally responsible in the management of our operations.  Emergent BioSolutions remains focused on building upon our past success and further expanding our presence as an innovative biopharmaceutical company with a simple mission – to protect life.”

About Emergent BioSolutions Inc.
Emergent BioSolutions Inc. is a biopharmaceutical company dedicated to one simple mission – to protect life.  We develop, manufacture and commercialize immunobiotics, consisting of vaccines and therapeutics that assist the body’s immune system to prevent or treat disease.  Our biodefense business focuses on immunobiotics for use against biological agents that are potential weapons of bioterrorism and biowarfare.  Our marketed product, BioThrax® (Anthrax Vaccine Adsorbed), is the only vaccine approved by the U.S. Food and Drug Administration for the prevention of anthrax infection.  Our commercial business focuses on immunobiotics for use against infectious diseases and other medical conditions that have resulted in significant unmet or underserved public health needs.  More information on the company is available at www.emergentbiosolutions.com.

Safe Harbor Statement
This press release includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Any statements, other than statements of historical fact, including statements regarding our strategy, future operations, future financial position, future revenues, projected costs, prospects, plans and objectives of management, including our expected revenue growth and net earnings for 2007, and any other statements containing the words “believes”, “expects”, “anticipates”, “plans”, “estimates” and similar expressions, are forward-looking statements. There are a number of important factors that could cause the company’s actual results to differ materially from those indicated by such forward-looking statements, including our ability to obtain new BioThrax® sales contracts with the U.S. government; our plans for future sales of BioThrax; our plans to pursue label expansions and improvements for BioThrax; our plans to expand our manufacturing facilities and capabilities; the rate and degree of market acceptance and clinical utility of our products; our ongoing and planned development programs, preclinical studies and clinical trials; our ability to identify and acquire or in license products and product candidates that satisfy our selection criteria; the potential benefits of our existing collaboration agreements and our ability to enter into selective additional collaboration arrangements; the timing of and our ability to obtain and maintain regulatory approvals for our product candidates; our commercialization, marketing and manufacturing capabilities and strategy; our intellectual property portfolio; our estimates regarding expenses, future revenue, capital requirements and needs for additional financing; and other factors identified in the company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2007 and subsequent reports filed with the SEC. The company disclaims any intention or obligation to update any forward-looking statements as a result of developments occurring after the date of this press release.