Influenza virus vaccines are widely used. It is known that there are differences in the breadth and duration of protection between inactivated (IIV) and live attenuated influenza virus (LAIV) vaccines with the latter inducing broader and longer lasting protection. However, it is unclear which factors are causing these differences. Here we aim to characterize the LAIV induced antibody response in peripheral blood and mucosal fluids to conserved epitopes on the viral hemagglutinin and neuraminidase. We hypothesize that induction of antibodies to conserved sites contributes to the better protection observed with LAIV. To investigate this, we will interrogate a unique set of samples from clinical trials performed with LAIV over two seasons in The Gambia. Data from this study will help us to better understand the mechanism of broad protection of LAIV and it will allow to gauge the potential of using LAIV as prime for subsequent boosts with hemagglutinin-stalk and/or neuraminidase based universal influenza virus vaccines.

Public Health Relevance

Inactivated influenza virus vaccines are poor inducers of antibodies to conserved viral epitopes on the hemagglutinin and neuraminidase. However, less is known about the induction of antibodies to conserved epitopes after immunization with live-attenuated influenza virus vaccines, especially in relatively nave children. Here we will characterize these responses.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Exploratory/Developmental Grants (R21)
Project #
1R21AI151917-01
Application #
9958668
Study Section
Special Emphasis Panel (ZRG1)
Program Officer
Gordon, Jennifer L
Project Start
2020-03-05
Project End
2022-02-28
Budget Start
2020-03-05
Budget End
2021-02-28
Support Year
1
Fiscal Year
2020
Total Cost
Indirect Cost
Name
Icahn School of Medicine at Mount Sinai
Department
Microbiology/Immun/Virology
Type
Schools of Medicine
DUNS #
078861598
City
New York
State
NY
Country
United States
Zip Code
10029