> A significant limitation of this study was the lack of approved testing to 100% rule out previous infection and it is possible the persistent S1 protein detected in the CD16+ monocytes of some of the patients in this study is from SARS-CoV-2 and not from the vaccine. There also exists the possibility that some of these new-onset symptoms post-COVID vaccination are unrelated to the vaccines. The data from this study also cannot make any inferences on epidemiology and prevalence for persistent post-vaccine symptoms. Thus, further studies and research need to be done to understand the risk factors, likelihood and prevalence of these symptoms.

https://www.medrxiv.org/content/10.1101/2024.03.24.24304286v...

But yes further study has to be made.