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In this study, healthcare workers with asymptomatic or mild SARS-CoV-2 infections had lower antibody titers and higher reinfection rates compared to those with more severe initial infections.

This study observed that male sex, diabetes mellitus, and high maximum C-reactive protein levels during the acute phase of COVID-19 were linked to elevated anti-SARS-CoV-2 antibody levels.

This study suggests that hormonal changes may contribute to the persistent symptoms of long COVID, with specific patterns observed in serum hormone levels related to fatigue and sensory dysfunction.

In this study, researchers reported that a newly developed interferon-γ release assay for cell-mediated immunity to SARS-CoV-2 nucleocapsid peptides demonstrated high sensitivity and specificity, making it a robust tool for routine diagnostic tests and potentially useful in predicting clinical outcomes after pathogen re-exposure.

This study observed that COVID-19 patients in Thailand infected with the Delta variant were more likely to develop pneumonia and certain post-infection conditions, while Omicron infections were associated with milder symptoms like sore throat and congestion.