SARS-CoV-2 reinfection increases risk of diseases and mortality - independent of vaccination. https://www.nature.com/articles/s41591-022-02051-3
Acute and postacute sequelae associated with SARS-CoV-2 reinfection - Nature Medicine
A new analysis using US Department of Veterans Affairs databases showed that reinfection is associated with increased risk of all-cause mortality, hospitalization and a wide range of long COVID complications in individuals who have had SARS-CoV-2 compared to those with no reinfection.