The 62-year-old man received 217 vaccines over a period of two and a half years. Doctors found that his immune levels were higher and that he had had no side effects.
The man was never infected by the coronavirus. He did not declare any side effects of the vaccine. And, most interestingly for researchers, his repertoire of antibodies and immune cells was considerably greater than that of a typical vaccinated person. The researchers found that even the 217th dose boosted the man's immune response. The finding suggested that man's elevated immune response could only be kept high by continually revaccinating.