Hundreds of boosters over a 29-month period had little effect on the one person who tried it.

Summary:

A 62-year-old man in Germany got a whopping 217 COVID-19 vaccines over nearly 3 years. Surprisingly, he reported no side effects and seemed healthy. Researchers studied his case to see if such extreme vaccination would weaken his immune system, as some have theorized.

The man’s immune response was indeed different, with higher antibody levels and specific immune cells. However, it functioned similarly to people with standard vaccination doses. He also hadn’t contracted COVID-19 (though this might be due to other factors).

While this is just one case, it suggests over-vaccination might not be detrimental. However, researchers strongly advise against this as a strategy to boost immunity.