>>13570010>But what is behind the apparent decline and what it means in practice, and for booster shots, is less clear.Yeah, doesn't seem Google is one's friend after all in this case.
>https://www.sciencemag.org/news/2020/08/why-flu-vaccines-don-t-protect-people-longFrom the study mentioned:
https://science.sciencemag.org/content/370/6513/237"because the influenza viral strains in circulation are continuously changing and ___because the antibody responses produced by the vaccine decline over time___."
So in fact, it seems you needed Google too before replying with
>>13569928, because OP was talking about degraded immunity for particular strains, which has nothing to do with viral adaptation. Antibody degradation for a particular strain is a real thing ("Although vaccination did generate influenza-specific cells, most were short-lived and lost within 1 year"). But none of this answers why this holds for influenza but not tetanus. So much for Google.
