This trial has been completed.

Condition influenza a virus, h7n9 subtype
Treatments h7n9 anhui 2013/aa ca, inactivated subvirion h7n9 vaccine
Phase phase 1
Sponsor National Institute of Allergy and Infectious Diseases (NIAID)
Start date October 2014
End date May 2016
Trial size 24 participants
Trial identifier NCT02274545, URMC 14-004


H7N9 viruses have caused an outbreak of severe respiratory disease in 2013-2014 in China that affected many older adults. This study will evaluate the safety of and immune response to a live attenuated H7N9 vaccine in adults 50 to 70 years old.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Intervention model single group assignment
Primary purpose prevention
Masking no masking
Participants will receive one dose of the H7N9 vaccine at Days 0 and 28. They will receive one dose of the inactivated subvirion H7N9 vaccine on Day 98.
h7n9 anhui 2013/aa ca H7N9 (6-2) AA ca recombinant vaccine
10^7.0 fluorescent focus units (FFU); 0.5 mL of vaccine will be delivered as a nasal spray by an Accuspray device (0.25 mL per nostril)
inactivated subvirion h7n9 vaccine H7N9 pIIV
30 mcg

Primary Outcomes

Frequency of vaccine-related reactogenicity events (REs) that occur during the acute monitoring (inpatient) phase of the study
time frame: Measured through Day 37
Area under the curve (AUC) of nasal virus shedding after each dose of vaccine
time frame: Measured through Day 180
Development of serum antibody assessed by either hemagglutination inhibition (HAI) or microneutralization (MN) assays following the H7N9 pLAIV or pIIV doses
time frame: Measured through Day 180

Secondary Outcomes

Development of a significant increase in nasal secretion hemagglutinin (HA)-specific antibody assessed by enzyme-linked immunosorbent assay (ELISA)
time frame: Measured through Day 180
Development of greater than 200 influenza-specific interferon-gamma-secreting cells per million lymphocytes as assessed by enzyme-linked immuno spot assay (ELISPOT) on Day 28 after immunization
time frame: Measured through Day 28
Detection of influenza-specific IgG or IgA secreting B cells on Day 7 following pLAIV vaccination assessed by antibody secreting cells (ASC) assay
time frame: Measured through Day 7

Eligibility Criteria

All participants from 50 years up to 70 years old.

Inclusion Criteria: - Adult males and non-pregnant females between 50 years and 70 years of age inclusive. Children will not be recruited or enrolled in this study because they are not in the apparent risk group, and for safety considerations and because of the need for isolation. - Are in good health, as determined by medical history and targeted physical examination to ensure any existing medical diagnoses or conditions (except those exclusionary) are stable. More information on this criterion can be found in the protocol. - Agree to storage of blood specimens for future research - Available for the duration of the trial. Participants must be willing and able to remain within the Isolation Unit for the specified duration of confinement. - Willingness to participate in the study as evidenced by signing the informed consent document - Female participants of child-bearing potential must agree to use effective birth control methods for the duration of the study (for example, pharmacologic contraceptives including oral, parenteral, and transcutaneous delivery; condoms with spermicide; diaphragm with spermicide; intrauterine device; abstinence from heterosexual intercourse; surgical sterilization). All female participants will be considered being of child-bearing potential except those who have undergone hysterectomy and those in whom menopause occurred at least 1 year prior to the study. - Agrees not to participate in another clinical trial with an investigational product for the entire duration of the study Exclusion Criteria: - Pregnancy as determined by a positive human choriogonadotropin (beta-HCG) test - Evidence of clinically significant neurologic, cardiac, pulmonary, hepatic, rheumatologic, autoimmune, or renal disease by history, physical examination, and/or laboratory studies including urine testing. Alanine aminotransferase (ALT) levels greater than 2 times the upper normal limit will be exclusionary at baseline, prior to vaccination. - Any current illness requiring daily medication other than the following: vitamins, birth control, anti-hypertensive medication, antihistamines, anti-depressant medication, cholesterol lowering medication, treatment for gastroesophageal reflux disease (GERD), and thyroid medication unless approved by the principal investigator. - Behavioral or cognitive impairment or psychiatric disease that in the opinion of the investigator affects the ability of the participant to understand and cooperate with the study protocol - Previous enrollment in an H7 or H9 influenza vaccine trial or in any study of an avian influenza vaccine - Seropositive to the H7N9 influenza A virus (serum HAI titer greater than 1:8) - Positive urine drug toxicology test indicating narcotic use/dependency - Have medical, occupational, or family problems as a result of alcohol or illicit drug use during the past 12 months - Other condition that in the opinion of the investigator would jeopardize the safety or rights of a participant in the trial or would render the participant unable to comply with the protocol - History of anaphylaxis to any components of the H7N9 vaccines - Allergy to oseltamivir as determined by participant report - Current diagnosis of asthma or reactive airway disease (within the past 2 years) - History of Guillain-Barré Syndrome - Positive ELISA and confirmatory Western blot tests for human immunodeficiency virus-1 (HIV-1) - Positive ELISA and confirmatory test (e.g., recombinant immunoblot assay) for hepatitis C virus (HCV) - Positive hepatitis B virus surface antigen (HBsAg) by ELISA - Known immunodeficiency syndrome - Use of corticosteroids (excluding topical preparations) or immunosuppressive drugs within 30 days prior to vaccination - Receipt of a live vaccine within 4 weeks or a killed vaccine within 2 weeks prior to study vaccination - History of asplenia - Receipt of blood or blood-derived products (including immunoglobulin) within 6 months prior to study vaccination - Current smoker unwilling to stop smoking for the duration of the inpatient stay. A current smoker includes anyone stating they currently smoke or use any amount of a tobacco product, including electronic cigarettes. After admission to the unit, nicotine patches will be provided to current smokers who request them for the inpatient portion of the study. - Travel to the Southern Hemisphere within 14 days prior to study vaccination - Travel on a cruise ship within 14 days prior to study vaccination - Receipt of another investigational vaccine or drug within 30 days prior to study vaccination - Allergy to eggs, egg products, or formaldehyde

Additional Information

Official title Phase 1 Evaluation of the Safety and Immunogenicity of Live Influenza A Vaccine H7N9 (6-2) AA ca Recombinant (A/Anhui/1/2013 (H7N9) x A/Ann Arbor/6/60 ca), a Live Attenuated Virus Vaccine Candidate for Prevention of Influenza H7N9 Disease in 50 to 70 Year Olds in the Event of a Pandemic
Principal investigator John Treanor, MD
Description H7N9 viruses caused an outbreak of severe respiratory disease in China in 2013-2014, which was associated with severe respiratory illness, acute respiratory distress syndrome (ARDS), intensive care unit (ICU) admissions, and death. The outbreak affected older adults and highlighted the need for a vaccine that is effective in this population. Prior studies have demonstrated the safety and immunogenicity of a vaccination regimen in which administration of the experimental H7N9 vaccine (H7N9 Anhui 2013/AA ca) was followed by an H7N9 inactivated vaccine in younger adults. This study will evaluate the safety and immunogenicity of a similar vaccination regimen in healthy adults, 50 to 70 years old, who are H7N9 seronegative. Participants will be admitted to the inpatient unit 2 days before they will receive their first vaccination with the H7N9 Anhui 2013/AA ca vaccine. All participants will receive one dose of the H7N9 vaccine, delivered as a nasal spray, on Day 0. While in the inpatient unit, study procedures will include physical examinations, medical history reviews, nasal swabs, and blood and urine collections. On Day 9, participants will be discharged from the inpatient unit provided they meet certain medical criteria. If not, they will remain in the isolation unit until the criteria are met. On Day 26, participants will be readmitted to the inpatient unit, and on Day 28, they will receive one dose of the H7N9 vaccine delivered as a nasal spray. Participants will remain in the inpatient unit until Day 37 and will take part in all of the same study procedures that occurred during the first inpatient stay. On Day 56, all participants will attend a study visit for a blood collection and nasal swab. On Day 98, all participants will receive one dose of the inactivated subvirion H7N9 vaccine. They will attend study visits on Days 101, 105, 112, 126, 154, and 180, which will include the same study procedures that occurred during the inpatient visits.
Trial information was received from ClinicalTrials.gov and was last updated in April 2017.
Information provided to ClinicalTrials.gov by National Institute of Allergy and Infectious Diseases (NIAID).