SEATTLE--Scientists at Group Health Research Institute are preparing for the potential pandemic spread of a new bird flu strain that caused severe disease in China earlier this year, joining researchers from seven other Vaccine and Treatment Evaluation Units funded by the National Institutes of Health (NIH) to test vaccines to protect against the illness in adults.
"Influenza viruses are constantly changing, and there is always a threat of a next pandemic," said Lisa Jackson, MD, MPH, a senior investigator at Group Health Research Institute and principal investigator of one of the two national research studies of this strain. "The new H7N9 strain that caused an outbreak in China earlier this year has not circulated in people, so we have no pre-existing immunity to it."
The vaccine includes proteins from the virus but cannot transmit influenza.
"Seattle is a 'gateway to the Pacific,'" Dr. Jackson added. "If this new strain of the influenza virus travels to the United States, Seattle is likely to be at risk, so it is important for us to be prepared. And whether or not the H7N9 influenza spreads to the United States in the future, our research will teach us a lot about how to protect ourselves from the next pandemic."
Dr. Jackson is a member of the team of infectious diseases researchers whose work will help shape public health policy and create influenza immunization plans to protect Americans should there be an outbreak of H7N9 (bird) flu.
The new bird influenza strain was first detected in 135 people, most of whom had contact with poultry, in China last spring. Most people had severe respiratory infections, and 44 peopleóor 32 percent of those who were illódied. While the median age of those stricken with the H7N9 flu was 58, four cases were confirmed in children.
Health authorities are preparing for possible H7N9 flu re-emergence during the normal flu season when the weather turns cooler, and for further virus mutation that might make it more easily transmitted between people.
"While the virus has not been detected in the United States and is not easily spread between people, public health officials are concerned the virus might change to become very contagious between people, which could trigger a global outbreak," said Dr. Jackson. "Should that occur, we need to be prepared with a vaccine to protect people from illness."
Pandemics happen when people don't have immunity to a new strain of influenza, which allows it to spread quickly. The last pandemic occurred in 2009 with the spread of H1N1 influenza, which originated in pigs and spread to people.
Typically, vaccines are the first line of defense against influenza. Within two or three weeks of getting a flu vaccine, the body mounts an immune response by making antibodies that fight the flu virus. Those who are vaccinated may not get sick if they are exposed to influenza or may have a much milder or shorter case of the illness.
"We know how to prevent flu with vaccine, and this study is designed to help us fine-tune the process," Dr. Jackson said. "We're studying how much active ingredient we need to put into the vaccine and if we can accelerate the process with a substance that improves the immune response."
The study being conducted at Group Health will recruit up to 1,000 adults nationally, who are age 19-64 years old and in good health. Study participants will receive different dosages of an investigational vaccine given with and without one of two adjuvants, which are substances added to a vaccine to increase the body's immune response.
Scientists will gather safety data to better understand the benefits and risks of this investigational vaccine and learn about its ability to trigger an immune response.
Eight Vaccine and Treatment Evaluation Units (VTEUs), which are funded by the National Institute of Allergy and Infectious Diseases (NIAID), part of the NIH, will participate in trials to investigate an H7N9 influenza vaccine. In addition to the VTEU at Group Health, other sites include Baylor College of Medicine, Houston; Children's Hospital Medical Center, Cincinnati; Emory University, Atlanta; University of Iowa, Iowa City; University of Maryland, Baltimore; Saint Louis University, St., Louis; and Vanderbilt University, Nashville. Additionally, the University of Texas Medical Branch in Galveston will be conducting the trial as a subcontractor to Baylor College of Medicine.
Further information about both clinical trials can be found at ClinicalTrials.gov using the identifiers: NCT01938742 and NCT01942265.
National Institutes of Health
The National Institutes of Health (NIH), the nation's medical research agency, includes 27 Institutes and Centers and is a component of the U.S. Department of Health and Human Services. NIH is the primary federal agency conducting and supporting basic, clinical, and translational medical research, and is investigating the causes, treatments, and cures for both common and rare diseases.
Vaccine and Treatment Evaluation Units
The Vaccine and Treatment Evaluation Units have played a key role in the Institute's effort to develop new and improved vaccines and therapies against infectious diseases for over four decades. They have conducted hundreds of clinical trials, many of which have contributed to vaccine licensure. An important strength of the VTEUs is their ability to enroll large numbers of volunteers into trials rapidly and vaccinate them in a safe, effective and quick manner. This rapid-response capability is especially important for testing vaccines designed to counteract emerging public health concerns, such as the ongoing pandemic of 2009 H1N1 influenza.
Group Health Research Institute
Group Health Research Institute does practical research that helps people like you and your family stay healthy. The Institute is the research arm of Seattle-based Group Health Cooperative, a consumer-governed, nonprofit health care system. Founded in 1947, Group Health Cooperative coordinates health care and coverage. Group Health Research Institute changed its name from Group Health Center for Health Studies in 2009. Since 1983, the Institute has conducted nonproprietary public-interest research on preventing, diagnosing, and treating major health problems. Government and private research grants provide its main funding.
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