Data from Historic Phase IIb Clinical Trial for Tuberculosis Vaccine Candidate MVA85A Published in The Lancet

  Data from Historic Phase IIb Clinical Trial for Tuberculosis Vaccine
  Candidate MVA85A Published in The Lancet

  *Vaccine candidate was generally well tolerated, meeting the study’s
    primary objective of safety
  *Vaccine candidate did not provide statistically-significant protection in
    preventing TB disease in infants previously vaccinated with BCG

Business Wire

LONDON -- February 4, 2013

Data were published in The Lancet today from a Phase IIb clinical trial
evaluating the safety and efficacy of MVA85A in preventing tuberculosis (TB)
in infants. MVA85A is a TB vaccine candidate designed to boost immune
responses already primed by the Bacille Calmette-Guérin (BCG) vaccine, the
currently licensed and widely used TB vaccine.

Data show that a single dose of MVA85A is not sufficient to confer
statistically significant protection against TB disease or infection in
infants who had been vaccinated at birth with BCG. There were 32 cases of TB
disease in the infants that received BCG + MVA85A compared with 39 cases of
disease among those receiving BCG + placebo. Non-significant vaccine efficacy
was measured at 17.3% (95% CI -31^.9% to 48^.2%) at study completion. The
vaccine candidate also did not provide statistically significant protection
from infection with Mycobacterium tuberculosis, the bacterium that causes TB,
which was a secondary efficacy endpoint.

“Although the results of this first efficacy trial of a new TB vaccine are not
what we had hoped for, further analysis of the data should reveal a great deal
about how the body’s immune system protects against TB and what is necessary
to develop an effective vaccine,” said senior author Prof. Helen McShane, a
Wellcome Trust Senior Clinical Research Fellow at the University of Oxford and
the original developer of the vaccine. “The results from this study should let
us know far more about the type and level of immune response required, and
that will boost future efforts to develop an effective TB vaccine by Oxford
and other researchers throughout the world. The difficulty of this task is one
reason why there has not been a new TB vaccine since BCG was developed more
than 90 years ago, but one is still urgently needed and I’m not about to give
up now.”

MVA85A is the first novel, preventive TB vaccine candidate since BCG to
complete a Phase IIb safety and efficacy study.

The study was successful in that the vaccine was well tolerated, there was no
evidence of any harm to the trial participants, and it gave a clear answer.
This study also showed it is possible to conduct a large infant efficacy
clinical trial in an area of high TB incidence with robust endpoints for
detecting disease, something that is expected to greatly benefit future
testing of TB vaccine candidates.

Funding for this clinical trial was provided by Aeras, a nonprofit biotech
with a social mission to develop TB vaccines, The Wellcome Trust, and the
Oxford-Emergent Tuberculosis Consortium (OETC), a joint venture between the
University of Oxford and Emergent BioSolutions. This Phase IIb study was
sponsored by Aeras and conducted by the University of Cape Town’s South
African Tuberculosis Vaccine Initiative (SATVI). The vaccine was originally
developed and investigated by the University of Oxford.

It is anticipated that further analysis of the data and samples collected will
be conducted for information that may be helpful for the development of new
vaccine candidates. For example, blood samples will be used to identify
markers that can predict whether a child will develop TB disease in the
future. These biomarkers are termed “correlates of risk” and may substantially
aid the development of new vaccines and contribute to different trial designs
in the future.

To access the manuscript abstract as published in The Lancet, please visit:
http://www.thelancet.com/journals/lancet/article/PIIS0140-6736(13)60177-4/abstract.

Partner Quotes

Aeras: “Vaccine development is an incredibly difficult undertaking, and the
scientific community has only become fully engaged in the development of TB
vaccines in the last decade,” said Tom Evans, MD, Aeras interim CEO. “Because
of the urgency to control the global TB epidemic, and despite these trial
results, we remain steadfast in our belief that an improved TB vaccine will be
developed and represents the best hope for eliminating the disease. The
valuable scientific understanding gained from this trial will provide crucial
information for the robust global portfolio of more than a dozen other TB
vaccines undergoing clinical testing, a number that was unimaginable a decade
ago.”

Emergent: “While we are clearly disappointed in the results announced today,
this study does demonstrate that a large-scale clinical trial testing a
vaccine in infants can be designed and run efficiently, adhering to the
highest standards of good clinical trial practices in a setting with a high TB
burden,” said Dr. Steve Chatfield, EVP and president of the biosciences
division at Emergent BioSolutions, and chairman of the Oxford-Emergent
Tuberculosis Consortium. “We are proud to have been part of this broad
international collaboration that brought together academic, product
development, manufacturing, and clinical trial expertise in an effort to make
a positive impact on global health.”

OETC: “Completion of the study has been a significant achievement by the
MVA85A development partners and demonstrates the advantages of collaboration
through a public-private partnership model to address global public health
challenges,” said Dr. Jacqui Shea, general manager of OETC. “While MVA85A has
not met its efficacy goal, this study should enable the TB vaccine community
to better understand the immune response against TB and help to design future
efficacy studies.”

SATVI: "We are proud to have completed the first efficacy trial of a new TB
vaccine in 90 years, and believe the results will guide the TB vaccine field
in the future,” said Prof. Willem Hanekom, director of the South African TB
Vaccine Initiative (SATVI). “The TB epidemic in our country is devastating –
half a million South Africans develop the disease every year. Prevention by an
effective vaccine would be the best way to get the epidemic under control.
With this goal in mind, our group will continue to test multiple new vaccine
candidates in the Worcester area. We are very grateful for the commitment of
the local community in this effort.”

Wellcome Trust: Dr. Ted Bianco, Director of Technology Transfer at the
Wellcome Trust, said: “It is no mean feat to design and implement a trial of
this kind and obtain a result as unequivocal as this. It is only through the
difficult business of evaluating candidate vaccines in humans that we will
really move forward in understanding how we might improve on BCG. I stand in
admiration of the professionalism of this international team that understands
the importance of well executed science, irrespective of the result one might
have hoped for.”

About TB Vaccine Development

BCG is the only licensed vaccine to prevent TB and it is used extensively with
approximately 100 million newborns being vaccinated globally each year^1,
according to the World Health Organization (WHO). While BCG can prevent severe
forms of TB in some children, its widespread use in infants has failed to
control the global epidemic.

Study Design

This Phase IIb study was a double blind, randomized, placebo-controlled trial
investigating the safety, immunogenicity and efficacy of MVA85A in
BCG-vaccinated infants.

The study, which began in 2009, was the first to evaluate MVA85A’s ability to
prevent TB disease following BCG vaccination. The study, in infants without TB
disease or HIV infection, involved a ‘prime-boost’ strategy that used MVA85A
to boost immune responses already primed by the BCG vaccine.

The study enrolled nearly 2,800 HIV-negative infants in the Western Cape
province of South Africa. All of the infants that participated in the study
received BCG at birth and then one half of the infants received a single dose
of MVA85A at 4-6 months of age and the other half received a placebo (Candida
skin test antigen). Approximately 93% of the infants enrolled completed the
study and have been monitored for up to 37 months for any signs of TB disease.
MVA85A was generally well tolerated and the vaccine had a safety profile
comparable to other pediatric vaccines. The most frequent side effect observed
was mild redness or swelling around the injection site following vaccination.

MVA85A is also being investigated in a Phase IIb efficacy study in people
living with HIV in Senegal and South Africa, a Phase IIa study in infants born
to HIV positive mothers in South Africa, and Phase I studies in the UK.

More About Tuberculosis (TB)

TB is an infectious disease that primarily affects the lungs and can be lethal
if left untreated. Symptoms of TB disease can vary from person to person and
by age, but may include a frequent, persistent cough (lasting three weeks or
more), coughing up of blood, unexplained weight loss, decreased appetite,
fatigue, fever, night sweats and chills, and chest pains.

Reference
  1.  World Health Organization,
         http://www.who.int/vaccine_safety/initiative/tools/BCG_Vaccine_rates_information_sheet.pdf

About Aeras

Aeras is a nonprofit biotech with a social mission, dedicated to advancing the
development of new tuberculosis vaccines. In collaboration with global
partners in Africa, Asia, North America and Europe, Aeras is supporting the
clinical testing of six experimental vaccines as well as a robust portfolio of
earlier stage candidates. Aeras receives funding from the Bill & Melinda Gates
Foundation, the UK Department for International Development, and the
Netherlands’ Ministry of Foreign Affairs and a range of other governments.
Aeras is based in Rockville, Maryland, Cape Town, South Africa, and Beijing,
China.

Aeras was the regulatory sponsor for this Phase IIb clinical trial of MVA85A
in infants. http://www.aeras.org/home/home.php.

About Emergent BioSolutions Inc.

Emergent BioSolutions (NYSE:EBS) is a specialty pharmaceutical company seeking
to protect and enhance life by offering specialized products to healthcare
providers and governments to address medical needs and emerging health
threats. More information is available on
http://www.emergentbiosolutions.com/. Follow us on twitter: @emergentbiosolu

About OETC

The Oxford-Emergent Tuberculosis Consortium Ltd ("OETC") is a joint venture
between the University of Oxford and Emergent BioSolutions. OETC was formed
with the aim of developing the MVA85A TB vaccine to meet both developed and
developing country health needs.

About Oxford University's Medical Sciences Division

Oxford University’s Medical Sciences Division is one of the largest biomedical
research centres in Europe, with over 2,500 people involved in research and
more than 2,800 students. The University is rated the best in the world for
medicine, and it is home to the UK’s top-ranked medical school. From the
genetic and molecular basis of disease to the latest advances in neuroscience,
Oxford is at the forefront of medical research. It has one of the largest
clinical trial portfolios in the UK and great expertise in taking discoveries
from the lab into the clinic. Partnerships with the local NHS Trusts enable
patients to benefit from close links between medical research and healthcare
delivery. A great strength of Oxford medicine is its long-standing network of
clinical research units in Asia and Africa, enabling world-leading research on
the most pressing global health challenges such as malaria, TB, HIV/AIDS and
flu. Oxford is also renowned for its large-scale studies which examine the
role of factors such as smoking, alcohol and diet on cancer, heart disease and
other conditions.

MVA85A was developed at Oxford University. http://www.ox.ac.uk/

About SATVI

Established in 2001, the University of Cape Town's South African Tuberculosis
Vaccine Initiative (SATVI) is the largest dedicated TB vaccine research group
on the African continent. It is located within the Institute of Infectious
Disease and Molecular Medicine of the University of Cape Town. Its mission is
to conduct innovative, high-quality TB vaccine research in Africa and impact
the global epidemic. A new, effective, affordable vaccine has the potential to
save hundreds of thousands of lives worldwide. SATVI is conducting
registration standard clinical trials of several novel TB vaccine candidates.
It is also engaging in projects to address critical clinical, epidemiological,
immunological and human genetic questions in TB vaccine development.

SATVI is conducting several studies of MVA85A, including the Phase IIb study
of MVA85A in infants. http://www.satvi.uct.ac.za/

About Wellcome Trust

The Wellcome Trust is a global charitable foundation dedicated to achieving
extraordinary improvements in human and animal health. We support the
brightest minds in biomedical research and the medical humanities. Our breadth
of support includes public engagement, education and the application of
research to improve health. We are independent of both political and
commercial interests.

The Wellcome Trust is providing funding support for the development of MVA85A.
http://www.wellcome.ac.uk/index.htm

Emergent 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
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and any other statements containing the words “believes”, “expects”,
“anticipates”, “intends”, “plans”, “estimates” and similar expressions, are
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current intentions, beliefs and expectations regarding future events. We
cannot guarantee that any forward-looking statement will be accurate.
Investors should realize that if underlying assumptions prove inaccurate or
unknown risks or uncertainties materialize, actual results could differ
materially from our expectations. Investors are, therefore, cautioned not to
place undue reliance on any forward-looking statement. Any forward-looking
statement speaks only as of the date of this press release, and, except as
required by law, we do not undertake to update any forward-looking statement
to reflect new information, events or circumstances.

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 the success of our ongoing and planned preclinical
studies and clinical trials; the rate and degree of market acceptance and
clinical utility of our products; the success of our ongoing and planned
development programs; the timing of and our ability to obtain and maintain
regulatory approvals for our product candidates; our commercialization,
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regarding expenses, future revenue, capital requirements and needs for
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Contact:

Aeras
Jamie Rosen
Media & Communications Manager
+1 202-870-3093
+44 (0) 787 607 1240
jrosen@aeras.org
or
Annmarie Leadman
Director, Communications
+1 240-599-3018
aleadman@aeras.org
or
Emergent BioSolutions Inc.
Investor Contact:
Robert G. Burrows,
Vice President, Investor Relations
+1 301-795-1877
BurrowsR@ebsi.com
or
Media Contact:
Tracey Schmitt
Vice President, Corporate Communications
+1 301-795-1800
SchmittT@ebsi.com
or
OETC
Dr. Jacqui Shea
General Manager
+44 (0) 118 944 3316
sheaj@ebsi.com
or
Oxford
Dr. Jonathan Wood
Press Officer
Medical Sciences
University of Oxford
+44 (0)1865 280530
jonathan.wood@admin.ox.ac.uk
or
SATVI
Linda Rhoda
Marketing and Communications Manager
Faculty of Health Sciences
University of Cape Town
+27 21 406 6685
Linda.Rhoda@uct.ac.za
or
Wellcome Trust
Dr. Jen Middleton
Senior Media Officer
+44 (0) 20 7611 7262
j.middleton@wellcome.ac.uk
 
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