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IgM antibody responses to vaccination with inactivated COVID-19 vaccine in PLWH and HNC. Titers (A) and seroconversion rates (B) of IgM at days 0-190 after vaccination. The threshold for a positive response is shown by the hashed line at 0.15 EU/mL. Data points are medians (error bars represent 95% CI). P value calculated using Mann–Whitney U test (A) or Fisher’s exact test (B).
