The Effects of Attenuated Versus Inactivated Flu Vaccine in Twin Sets

Influenza Clinical Trial

— FLU-TW  

Official title:

The Effects of Attenuated Versus Inactivated Flu Vaccine in Twin Sets

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03898986
• Other study ID #: 50200
• Secondary ID: 5U19AI057229-15
• Status: Completed
• Phase: Phase 1
• Start date: October 8, 2019
• Est. completion date: December 31, 2023

Study information

• Verified date: January 2024
• Source: Stanford University
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This is one project of a larger ongoing study related to the immune system's response to the flu virus. This study is designed to investigate the immune response to the live attenuated influenza vaccine (LAIV) vs. the Inactivated Influenza Vaccine (IIV) in identical and fraternal twins.

Description:

This is a Phase I mechanistic study of licensed influenza vaccines. The study requires 10 monozygotic and 10 dizygotic sets of twins (40 total participants) to enroll. The duration of the study for an individual volunteer will be 4 weeks including screening and active participation. The study has a total of 3 visits. First visit: Procedures during this visit are: Informed consent process, enrollment, study assessments, 20 ml blood draw, and vaccination. Participants will be randomized to receive either LAIV or IIV. The time required to complete the first study visit will be about 30-40 minutes. 2nd (day 7 post vaccination) and 3rd (day 28 post vaccination ) visit: 20 ml blood will be obtained and the visit will take approximately 15 minutes.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 18
• Est. completion date: December 31, 2023
• Est. primary completion date: December 31, 2023
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 2 Years to 20 Years

Eligibility

Inclusion Criteria:

1. 2-20 year old male and female patients

2. Willing and able to complete the informed consent process

3. Availability of twin pair also agreeable and eligible for study inclusion

4. Availability for follow-up for the planned duration of the study

5. Acceptable medical history by review of inclusion/exclusion criteria

Exclusion Criteria:

1. Prior off-study vaccination with seasonal influenza vaccine within three months of study vaccination

2. Life-threatening reactions to previous influenza vaccinations

3. Asthma (contraindication for receipt of LAIV4)

4. Allergy to egg or egg products or to vaccine components including gentamicin, gelatin, arginine or MSG.

5. Active systemic or serious concurrent illness, including febrile illness on the day of vaccination

6. History of immunodeficiency (including HIV infection)

7. Known or suspected impairment of immunologic function; may include significant liver disease, diabetes mellitus treated with insulin or moderate to severe renal disease

8. Hospitalization in the past year for congestive heart failure or emphysema.

9. Chronic Hepatitis B or C.

10. Recent or current use of immunosuppressive medication, including systemic glucocorticoids (corticosteroid nasal sprays and topical steroids are permissible). Use of oral steroids (<20mg prednisone-equivalent/day) may be acceptable after review by the investigator.

11. Participants in close contact with anyone who has a severely weakened immune system

12. Malignancy, other than squamous cell or basal cell skin cancer (includes solid tumors such as breast cancer or prostate cancer with recurrence in the past year, and any hematologic cancer such as leukemia).

13. Autoimmune disease (including rheumatoid arthritis treated with immunosuppressive medication such as Plaquenil, methotrexate, prednisone, Enbrel) which, in the opinion of the investigator might jeopardize volunteer safety or compliance with the protocol.

14. History of blood dyscrasias, renal disease, or hemoglobinopathies requiring regular medical follow up or hospitalization during the preceding year

15. Use of any anti-coagulation medication such as Coumadin or Lovenox, or anti-platelet agents such as aspirin (except up to 325 mg. per day), Plavix, or Aggrenox will be reviewed by investigators to determine if study participation would affect the volunteer's safety or compliance with the protocol.

16. Has taken an influenza antiviral medication within 48 hours prior to study vaccination [If yes, may not eligible if unable to schedule at an appropriate interval].

17. Receipt of blood or blood products within the past 6 months or planned used during the study.

18. Medical or psychiatric condition or occupational responsibilities that preclude participant compliance with the protocol

19. Receipt of an inactivated vaccine 14 days prior to study enrollment, or planned vaccinations prior to completion of last study visit (~ 14 days after study vaccination)

20. Receipt of a live, attenuated vaccine within 60 days prior to enrollment of planned vaccination prior to completion of last study visit (~ 14 days after study enrollment)

21. Need for allergy immunization (that cannot be postponed) until after the last study visit.

22. History of Guillain-Barre# syndrome

23. Pregnant woman

24. Breastfeeding woman

25. Use of investigational agents within 30 days prior to enrollment or planned use during the study.

26. Donation of the equivalent of a unit of blood within 6 weeks prior to enrollment or donation of platelets within 2 weeks of enrollment or planned donation prior to completion of the last visit.

27. Any condition which, in the opinion of the investigator, might interfere with volunteer safety, study objectives or the ability of the participant to understand or comply with the study protocol.

Related Conditions & MeSH terms

• Influenza

Intervention

Biological:
• Live attenuated influenza vaccine (LAIV4)
LAIV4 vaccine dosage is 0.2 mL. The vaccine will be administered as an intranasal spray. Each sprayer contains a single dose of FluMist® Quadrivalent; approximately one-half of the contents should be administered into each nostril. 0.1 mL (i.e., half of the dose from a single FluMist sprayer) is administered into each nostril while the recipient is in an upright position. Insert the tip of the sprayer just inside the nose and rapidly depress the plunger until the dose-divider clip stops the plunger. The dose-divider clip is removed from the sprayer to administer the second half of the dose (0.1 mL) into the other nostril.
• Inactivated Influenza Vaccine (IIV4)
IIV4 vaccine will be administered as a 0.5 mL dose, with a sterile, disposable syringe and needle by IM injection.

Locations

Country	Name	City	State
United States	Stanford University School of Medicine	Stanford	California

Sponsors (3)

Lead Sponsor	Collaborator
Stanford University	National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH)

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	HAI titers	Evaluate HAI titers in response to influenza vaccination.	Day 0 to Day 28