Recovery of Antibody Immunity After a Resurgence of Respiratory Syncytial Virus Infections.

Reicherz, Frederic; Viñeta Paramo, Marina; Bone, Jeffrey N; Lavoie, Alexanne; Li, Sirui; Golding, Liam; Jassem, Agatha; Watts, Allison et al. · J Infect Dis · 2025

prospective_cohort · Level II

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Abstract

Longitudinal measurements of respiratory syncytial virus (RSV) immunity over 4 winter seasons reveal that viral neutralization titers, RSV prefusion F protein (pre-F)-specific immunoglobulin M and immunoglobulin G (IgG) levels, and RSV antibody-dependent cellular phagocytosis function gradually returned to prepandemic levels in female healthcare and school workers of childbearing age after 2 winter seasons, following the resurgence of RSV cases in the Vancouver metropolitan region (British Columbia, Canada). In contrast, pre-F IgG avidity profiles remained unchanged. These findings support the notion that repeated viral infections are necessary to maintain high RSV antibody levels in the population.

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