A two-and-a-half-year peer-reviewed study by Ohio State University researchers found that among hospitalized COVID-19 patients, those who received mRNA COVID-19 vaccines had a significantly higher mortality rate than unvaccinated patients, even when accounting for age and comorbidities.

https://childrenshealthdefense.org/defender/vaxxed-covid-patients-death-rate-unvaxxed-study/?

AND

Brief research report: impact of vaccination on antibody responses and mortality from severe COVID-19

https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2024.1325243/full