In another comment from over a month ago, I included a link to a study that found spike protein in the vaxxed even 12 months after the injection -- but that was as long as the study went. So, probably longer.

Possible remedies include Nattokinase, an enzyme that degrades the spike protein:

In particular, nattokinase shows great promise. From Dr. McCullough:

I have found nattokinase, the Japanese product derived from natto (a traditional Japanese food made from whole soybeans that have been fermented with Bacillus subtilis var. natto.) to be the most compelling and scientifically supported approach to clear Spike protein out of the body via proteolytic degradation. https://dailycaller.com/2023/04/04/dr-peter-mccullough-3-things-you-need-to-know-about-treating-spike-post-covid-syndrome/

Also, ivermectin, the amino acid Taurine -- which has been getting press recently both for help with vax problems and for longevity benefits -- and the MK-7 fraction of vitamin K2, which is found in only some of the Vitamin K supplements on the market.