Prior COVID-19 infection decreases mortality upon reinfection.
the verdict
SUPPORTED
the evidence backs this
confidence 75/100
Clinical studies consistently show that prior COVID-19 infection confers natural immunity that significantly decreases the severity of illness and mortality upon reinfection.
Evidence for · 2
Prognostic factors associated with recurrent COVID-19 and impact of SARS-CoV-2 vaccine on patients with chronic lymphocytic leukemia.
2025 · cited by 0
This study found that subsequent COVID-19 episodes (reinfections) among chronic lymphocytic leukemia patients were significantly milder than the initial event, with lower rates of pneumonia, hospitalization, and no related deaths.
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More for · 1
Demographic and socioeconomic characteristics associated with SARS-CoV-2 reinfection: An observational study.
2026 · cited by 0
This observational study demonstrated that the risk of progressing to moderate or severe disease was higher during the first infection compared to the second episode.