A 62-year-old man in Germany decided to get 217 Covid-19 vaccinations over the course of 29 months —for “private reasons.” But, somewhat surprisingly, he doesn’t seem to have suffered any ill effects from the excessive immunization, according to a newly published case study in The Lancet Infectious Diseases.
The case is just one person, of course, so the findings can’t be extrapolated to the general population. But, they conflict with a widely held concern among researchers that such overexposure to vaccination could lead to weaker immune response. Some experts have raised this concern in discussions over how frequently people should get Covid-19 booster doses.
In cases of chronic exposure to a
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