Impact of Immune Priming, Vaccination, and Infection on Influenza A(H3N2) Antibody Landscapes in Children

Details

• Alternative Title:
  J Infect Dis
• Personal Author:
  Hinojosa, Michael ; Shepard, Samuel S. ; Chung, Jessie R. ; King, Jennifer P. ; McLean, Huong Q. ; Flannery, Brendan ; Belongia, Edward A. ; Levine, Min Z.
• Description:
  Background.
  
  Preexisting antibodies to influenza, shaped by early infection and subsequent exposures, may impact responses to influenza vaccination.
  
  Methods.
  
  We enrolled 72 children (aged 7–17 years) in 2015–2016; all received inactivated influenza vaccines. Forty-one were also vaccinated in 2014–2015, with 12 becoming infected with A(H3N2) in 2014–2015. Thirty-one children did not have documented influenza exposures in the prior 5 seasons. Sera were collected pre- and postvaccination in both seasons. We constructed antibody landscapes using hemagglutination inhibition antibody titers against 16 A(H3N2) viruses representative of major antigenic clusters that circulated between 1968 and 2015.
  
  Results.
  
  The breadth of the antibody landscapes increased with age. Vaccine-induced antibody responses correlated with boosting of titers to previously encountered antigens. Postvaccination titers were the highest against vaccine antigens rather than the historic A(H3N2) viruses previously encountered. Prevaccination titers to the vaccine were the strongest predictors of postvaccination titers. Responses to vaccine antigens did not differ by likely priming virus. Influenza A(H3N2)-infected children in 2014–2015 had narrower antibody landscapes than those uninfected, but prior season infection status had little effect on antibody landscapes following 2015–2016 vaccination.
  
  Conclusions.
  
  A(H3N2) antibody landscapes in children were largely determined by age-related immune priming, rather than recent vaccination or infection.
  
  
• Subjects:
  Antibody Landscape Article Birth Cohorts Immune Priming Infection Influenza Vaccination
• Source:
  J Infect Dis. 224(3):469-480
• Pubmed ID:
  33090202
• Pubmed Central ID:
  PMC8145779
• Document Type:
  Journal Article
• Funding:
  CC999999/ImCDC/Intramural CDC HHSUnited States/ ; U01IP001038/ACL/ACL HHSUnited States/ ; 5 U01IP001038/CC/CDC HHSUnited States/ ; CDC to the Marshfield Clinic Research Institute/
• Volume:
  224
• Issue:
  3
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:dacc8338eff363dd381e093f6e8df28e03848ac50cabe18d5a9a650f6d1f942b
• Download URL:
  https://stacks.cdc.gov/view/cdc/106682/cdc_106682_DS1.pdf
• File Type:
  [PDF - 1.66 MB ]