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Persistent but Dysfunctional Mucosal SARS-CoV-2-specific IgA and Low Lung IL-1β Associate with COVID-19 Fatal Outcome: A Cross-sectional Analysis

Abstract

Highlights: Mucosal pulmonary antibody response in COVID-19 outcome remains unclear. We show that in severe COVID-19 patients, mucosal pulmonary non-neutralizing SARS-CoV-2 IgA persit after viral clearance in the lung. Furthermore, low lung IL-1β correlate with fatal COVID-19. Altogether, mucosal IgA may exert harmful functions beside protective neutralization.

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