An injection after natural immunity wipes-out an otherwise lasting, robust natural immunity to replace it with short lasting artificial immunity that falls in the negatives at week 20.
If that study was true, you could verrify it because the more injections would correlate with more infection.
Here is one such study : https://www.nejm.org/doi/full/10.1056/NEJMc2209371?query=featured_home
An injection after natural immunity wipes-out an otherwise lasting, robust natural immunity to replace it with short lasting artificial immunity that falls in the negatives at week 20.
If that study was true, you could verrify it because the more injections would correlate with more infection.
And it's exactly what happens : https://i.redd.it/rqlyg8mwce8a1.png