Those claims have been proven to be completely wrong by scientific studies. Natural immunity that comes from actual COVID infection is many times stronger then vaccinated immune response.

Marty Makary is a professor at the Johns Hopkins School of Medicine and Bloomberg School of Public Health, editor-in-chief of Medpage Today, and author of "The Price We Pay: What Broke American Health Care — and How to Fix It." [2021 opinion article in Washington Post[

It's okay to have an incorrect scientific hypothesis. But when new data proves it wrong, you have to adapt. Unfortunately, many elected leaders and public health officials have held on far too long to the hypothesis that natural immunity offers unreliable protection against covid-19 — a contention that is being rapidly debunked by science.

More than 15 studies have demonstrated the power of immunity acquired by previously having the virus. A 700,000-person study from Israel two weeks ago found that those who had experienced prior infections were 27 times less likely to get a second symptomatic covid infection than those who were vaccinated. This affirmed a June Cleveland Clinic study of health-care workers (who are often exposed to the virus), in which none who had previously tested positive for the coronavirus got reinfected. The study authors concluded that "individuals who have had SARS-CoV-2 infection are unlikely to benefit from covid-19 vaccination." And in May, a Washington University study found that even a mild covid infection resulted in long-lasting immunity.

The scientific evidence was already clear in 2021. More recent studies continue to provide clear evidence that natural COVID immunity is better than vaccines.