Study to Evaluate the Safety of 1 New 6:2 Influenza Virus Reassortant in Adults for the 2017-2018 Season

Phase 4

Completed

Conditions: Influenza
Healthy

Interventions: Other: Placebo
Biological: Monovalent Influenza Vaccine

Registration Number: NCT03158038

Lead Sponsor: MedImmune LLC

Brief Summary: This prospective annual release study is designed to evaluate the safety of 1 new influenza virus vaccine strain to be included in FluMist Quadrivalent for the 2017-2018 influenza season.

Detailed Description: This prospective, randomized, double-blind, placebo-controlled release study will enroll approximately 300 healthy adults 18 to 49 years of age (not yet reached their 50th birthday). Eligible participants will be randomly assigned in a 4:1 fashion to receive a single dose of monovalent vaccine or placebo by intranasal spray. Randomization will be stratified by site. This study will be conducted at 2 sites in the United States of America. Each participant will receive 1 dose of investigational product on Day 1. The duration of study participation for each participant is the time from study vaccination through 180 days after study vaccination.

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 300

Inclusion Criteria

Age 18 through 49 years
Written informed consent
Participant available by telephone
Ability to understand and comply with the requirements of the protocol, as judged by the Investigator

Key

Exclusion Criteria

Concurrent enrollment in another clinical study up to 180 days after receipt of investigational product (Day 181)
History of hypersensitivity to any component of the vaccine, including egg or egg protein or serious, life threatening, or severe reactions to previous influenza vaccinations
Any condition for which the inactivated influenza vaccine is indicated, including chronic disorders of the pulmonary or cardiovascular systems (example [eg], asthma), chronic metabolic diseases (eg, diabetes mellitus), renal dysfunction, or hemoglobinopathies that required regular medical follow-up or hospitalization during the preceding year
Acute febrile (greater than [>] 100.0 degrees Fahrenheit [F] oral or equivalent) and/or clinically significant respiratory illness (example, cough or sore throat) within 14 days to randomization
Any known immunosuppressive condition or immune deficiency diseases, including human immunodeficiency virus infection, or ongoing immunosuppressive therapy
History of Guillain-Barre syndrome
Receipt of any investigational agent within 30 days prior to randomization, or expected receipt through 30 days after the dose of investigational product (use of licensed agents for indications not listed in the Package Insert is permitted)
Receipt of any non-study vaccine within 30 days prior to randomization, or expected receipt through 30 days after receipt of investigational product
Expected receipt of antipyretic or analgesic medication on a daily or every other day basis from randomization through 14 days after receipt of investigational product
Administration of intranasal medications within 14 days prior to randomization, or expected receipt through 14 days after administration of investigational product
Receipt of influenza antiviral therapy or influenza antiviral agents within 48 hours prior to investigational product administration or expected receipt of influenza antiviral therapy or influenza antiviral agents through 14 days after receipt of investigational product

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Placebo	Placebo	Participants will receive a single dose of placebo matching with monovalent influenza vaccine by intranasal spray on Day 1.
Monovalent Influenza Vaccine	Monovalent Influenza Vaccine	Participants will receive a single dose of monovalent influenza vaccine \[10\^7.0 +/- 0.5 fluorescent focus unit (FFU) of each of 1 cold adapted (ca), attenuated (att), temperature sensitive (ts) 6:2 reassortant influenza strain\] by intranasal spray on Day 1.

Primary Outcome Measures

Name	Time	Method
Percentage of Participants With Fever Greater Than or Equal to (>=) 101 Degrees Fahrenheit (F)	Baseline (Day 1) up to Day 8	Percentage of participants with fever defined as oral temperature \>=101 degrees F were reported.

Secondary Outcome Measures

Name	Time	Method
Percentage of Participants With Solicited Symptoms	Baseline (Day 1) up to Day 8 and Day 15	Solicited symptoms are predefined symptoms or events specifically inquired about and assessed daily after vaccine administration up to 15 days after vaccination. The solicited symptoms include fever greater than (\>) 100.0 degrees F (37.8 degrees Celsius), runny nose, sore throat, cough, vomiting, muscle aches, chills, decreased activity and headache. Results were reported for all solicited symptoms except fever \>=101 degrees F (reported as primary outcome) up to 8 days after vaccination and all solicited symptoms up to 15 days after vaccination.
Number of Participants With Treatment-Emergent Serious Adverse Events (TESAEs) and New Onset Chronic Diseases (NOCDs)	Baseline (Day 1) up to Day 29 and Day 181	An AE is any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. An serious adverse event (SAE) is an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly. Treatment-emergent SAEs were serious events between administration of study drug and up to 181 days after the dose that are absent before treatment or that worsen relative to pretreatment state. An NOCD is a newly diagnosed medical condition that is of a chronic, ongoing nature and is assessed by the investigator as medically significant. Results were given for TESAEs and NOCDs reported up to 29 days and 181 days after vaccination.
Number of Participants With Treatment-Emergent Adverse Events (TEAEs)	Baseline (Day 1) up to Day 8 and Day 15	An adverse event (AE) is any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. Treatment-emergent AEs were events between administration of study drug and up to 15 days after vaccination that are absent before treatment or that worsened relative to pre-treatment state. Results were given for AEs reported up to 8 days and 15 days after vaccination.
Percentage of Participants Who Require Antipyretic and/or Analgesic Medication	Baseline (Day 1) up to Day 8 and Day 15	Percentage of participants who require antipyretic and/or analgesic medication were reported.