Serological differentiation between naturally acquired mpox and MVA-BN-vaccine induced antibody responses using ratios of MPXV and VACV antigen pairs in the MSD immunoassay.

Unlabelled: This study's aim was to evaluate and benchmark the gold-standard methods neutralization test (NT) and immunofluorescence (IF), against a model linked to a multiplex immunoassay method for analysis of the highly cross-reactive serological responses against the monkeypox (MPXV)- and vaccinia (VACV) viruses. Serum samples from men who have sex with men were analyzed (22 with previous PCR-confirmed mpox episode, 53 MVA-BN-vaccinated, 61 unexposed to infection/vaccination). In-house NTs and IF established titers of mpox- and vaccinia-specific neutralizing and binding IgG antibodies, respectively.

Dysregulated Adaptive Immune Responses to SARS-CoV-2 in Immunocompromised Individuals.

The SARS-CoV-2 virus poses a significant risk to immunocompromised patients, who display weakened immunity and reduced seroconversion following infection and vaccination. In this study, we recruited 19 hospitalized patients with immune disorders (ImCo) and 4 immunocompetent controls (ICC) with COVID-19. We evaluated their serological, humoral, and cellular immune responses at <30 days and >90 days post-symptom onset.