Natural immunity
81 research studies confirm that natural immunity to COVID is equal or superior to “vaccine-induced immunity.”
Lancet published study on effectiveness of COVID vaccines and waning of immunity with time. Study showed: immune function among vaxed individuals 8 months after administration of 2 doses of COVID-19 vaccine was lower than that among the unvaxed individuals
https://virologyj.biomedcentral.com/articles/10.1186/s12985-022-01831-0
Natural immunity vs. vaccine-induced immunity (Source: cdc.gov - Explanation):
COVID vaccine reduces the risk of hospitalization considerably (by x10-x20)
Natural immunity reduces the risk of hospitalization even more (by x20-x50)
COVID vaccine with Natural immunity does not reduce the risk of hospitalization, possibly slightly increases it.