COVID-19 mRNA Vaccination Generates Greater Immunoglobulin G Levels in Women Compared to Men.

Demonbreun, Alexis R; Sancilio, Amelia; Velez, Matt E; Ryan, Daniel T; Pesce, Lorenzo; Saber, Rana; Vaught, Lauren A; Reiser, Nina L et al. · J Infect Dis · 2021

prospective_cohort · Level II

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Abstract

We investigated whether the antibody response to coronavirus disease 2019 (COVID-19) mRNA vaccination is similar in women and men. In a community cohort without prior COVID-19, first vaccine dose produced higher immunoglobulin G (IgG) levels and percent inhibition of spike-ACE2 receptor binding, a surrogate measure of virus neutralization, in women compared to men (7.0 µg/mL, 51.6% vs 3.3 µg/mL, 36.4%). After 2 doses, IgG levels remained significantly higher for women (30.4 µg/mL) compared to men (20.6 µg/mL), while percent inhibition was similar (98.4% vs 97.7%). Sex-specific antibody response to mRNA vaccination informs future efforts to understand vaccine protection and side effects.

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