Immune imprinting in early life shapes cross-reactivity to influenza B virus haemagglutinin

Nat Microbiol. 2024 Aug;9(8):2073-2083. doi: 10.1038/s41564-024-01732-8. Epub 2024 Jun 18.

Abstract

Influenza exposures early in life are believed to shape future susceptibility to influenza infections by imprinting immunological biases that affect cross-reactivity to future influenza viruses. However, direct serological evidence linked to susceptibility is limited. Here we analysed haemagglutination-inhibition titres in 1,451 cross-sectional samples collected between 1992 and 2020, from individuals born between 1917 and 2008, against influenza B virus (IBV) isolates from 1940 to 2021. We included testing of 'future' isolates that circulated after sample collection. We show that immunological biases are conferred by early life IBV infection and result in lineage-specific cross-reactivity of a birth cohort towards future IBV isolates. This translates into differential estimates of susceptibility between birth cohorts towards the B/Yamagata and B/Victoria lineages, predicting lineage-specific birth-cohort distributions of observed medically attended IBV infections. Our data suggest that immunological measurements of imprinting could be important in modelling and predicting virus epidemiology.

MeSH terms

  • Adult
  • Antibodies, Viral* / blood
  • Antibodies, Viral* / immunology
  • Birth Cohort
  • Cross Reactions* / immunology
  • Cross-Sectional Studies
  • Disease Susceptibility / immunology
  • Female
  • Hemagglutination Inhibition Tests
  • Hemagglutinin Glycoproteins, Influenza Virus / immunology
  • Humans
  • Influenza B virus* / immunology
  • Influenza, Human* / immunology
  • Influenza, Human* / virology
  • Male
  • Middle Aged

Substances

  • Antibodies, Viral
  • Hemagglutinin Glycoproteins, Influenza Virus