This article disagrees with your assertion:
A new study concludes that a COVID-19 mRNA vaccine is around five times more effective at preventing hospitalization than a previous SARS-CoV-2 infection.
www.medicalnewstoday.com
According to the study authors, “These findings suggest that among hospitalized adults with COVID-19-like illness whose previous infection or vaccination occurred 90–179 days earlier, vaccine-induced immunity was more protective than infection-induced immunity against laboratory-confirmed COVID-19.”
Dr. William Schaffner, a professor of medicine in the Division of
Infectious Diseases at Vanderbilt University School of Medicine in Nashville, TN, commented on the study during an interview with
Medical News Today.
He said: “For a long time, we’ve known that people [who have the infection], if they are subsequently vaccinated, will have much higher levels of antibodies than people who [have the infection] but are not vaccinated. Natural infection plus vaccination is better than natural infection alone.”
The study authors refer to a recent
Israeli study that reported conflicting results. The Israeli study found that “natural immunity confers longer lasting and stronger protection against infection, symptomatic disease, and hospitalization caused by the Delta variant of SARS-CoV-2 [than] the BNT162b2 two-dose vaccine-induced immunity.”